--- product_id: 539557125 title: "Black Practice Trainer with Durable Build – Safe Cool Design – Training Tool – CSGO Fidget Toy – Perfect for Man, Boyfriend, Father, Son, Teens – Birthday Gift Idea K19 B" brand: "good worker" price: "€ 36.82" currency: EUR in_stock: true reviews_count: 8 category: "Good Worker" url: https://www.desertcart.hr/products/539557125-black-practice-trainer-with-durable-build-safe-cool-design-training store_origin: HR region: Croatia --- # Spring latch lock for secure closure Optimal balance & 4.69 oz lightweight 420C stainless steel, 58 HRC hardness Black Practice Trainer with Durable Build – Safe Cool Design – Training Tool – CSGO Fidget Toy – Perfect for Man, Boyfriend, Father, Son, Teens – Birthday Gift Idea K19 B **Brand:** good worker **Price:** € 36.82 **Availability:** ✅ In Stock ## Summary > 🖤 Flip like a pro, train like a legend. ## Quick Answers - **What is this?** Black Practice Trainer with Durable Build – Safe Cool Design – Training Tool – CSGO Fidget Toy – Perfect for Man, Boyfriend, Father, Son, Teens – Birthday Gift Idea K19 B by good worker - **How much does it cost?** € 36.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/539557125-black-practice-trainer-with-durable-build-safe-cool-design-training) ## Best For - good worker enthusiasts ## Why This Product - Trusted good worker brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless One-Move Unlock:** Spring latch lock opens smoothly with a single thumb push for seamless training flow. - • **Customizable Tension Control:** Easily adjust pivot tightness to match your flipping style and skill progression. - • **Built to Last with 420C Steel:** Reinforced screws and pins ensure durability through countless practice sessions. - • **Precision-Tuned Flipping Action:** Experience flawless spins with ergonomic, non-slip handles designed for all skill levels. - • **Sleek, Modern Design for Everyday Carry:** Lightweight and ambidextrous, perfect for professionals who value style and function. ## Overview The GOOD WORKER Black Practice Trainer is a premium 420C stainless steel balisong trainer featuring a 3.94" blade length and a secure spring latch lock. Weighing just 4.69 oz, it offers optimal balance and precision-tuned pivots for smooth flipping. Designed for beginners to experts, its reinforced build and adjustable pivot screws provide durability and customizable handling, making it the ultimate training tool and stylish fidget toy for enthusiasts and professionals alike. ## Description desertcart.com : GOOD WORKER Black Practice Trainer with Durable Build – Safe Cool Design – Training Tool – CSGO Fidget Toy – Perfect for Boyfriend, Father, Son, Teens – Birthday Gift Idea K19 B : Sports & Outdoors Review: Great for beginners and smooth to flip - I got this trainer butterfly knife to safely learn tricks without worrying about cuts, and I’m really happy with it. It’s well-balanced and has a solid feel—surprisingly sturdy for the price. The handles flip smoothly, and the weight makes it easy to practice without feeling too heavy or too light. The "blade" is blunt and safe, which is perfect for beginners (or parents of kids who are into this stuff). No sharp edges, but it still looks cool and gives a realistic feel. I’ve dropped it more times than I can count, and it’s holding up really well—no loose screws or major damage. The latch works fine, though it can get in the way during tricks sometimes (nothing a rubber band or quick mod can’t fix). Great choice if you're just getting into flipping or want a safe way to practice without risking your fingers. Fun, durable, and definitely worth it. Great for kids too! Review: It was on time - It was good ## Features - Black trainer is made of 420C stainless steel (58 HRC) with reinforced screws & pins, providing a reliable training experience. Lock type - spring latch; Blade length - 3.94"; Handle length - 5.12"; Overall length - 9.06"; Weight - 4.69 oz. - Durable build. We use high-quality stainless steel with reinforced screws, pins. Our training tool is designed for optimal balance, durability, handling and reliable use through practice sessions - Latch lock. The trainer has the latch lock, which secures handles in the closed position. To open, it is pushed back with a thumb after which the handles rotate freely around their axes. Our trainer can be opened with a single movement. - Perfect flipping action. Precision-tuned pivots and a non-slip ergonomic handle deliver the perfect experience for beginners, teens, adults and experts - Instruction to loose / tighten your trainer. Open the latch located on the bottom of the trainer, hold the handle and tighten the pivot screw using a suitable screwdriver (located where the handle meets the blade base). Repeat the process for the other handle. Ensure that the handles aren't overtightened ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BYP86GXG | | Age Range (Description) | Adult | | Age Range Description | Adult | | Best Sellers Rank | #13,276 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Martial Arts Ninja Weapons | | Blade Length | 3.94 inches | | Blade Material | Stainless Steel | | Blade Shape | Straight Back | | Blade Type | – | | Brand | GOOD WORKER | | Brand Name | GOOD WORKER | | Color | 1. Black | | Customer Package Type | Standard Packaging | | Customer Reviews | 4.4 out of 5 stars 648 Reviews | | Hand Orientation | Ambidextrous | | Handle Material | Stainless Steel | | Included Components | No | | Item Length | 9.06 inches | | Item Shape | – | | Item Weight | 4.69 ounces | | Manufacturer | GOOD WORKER | | Model Name | K19B | | Model Number | K19B | | Number of Items | 1 | | Orientation | Adjustable | | Part Number | K19B | | Product Care Instructions | Hand Wash Only | | Recommended Uses For Product | Training | | Reusability | Reusable | | Set Name | Black | | Size | 3.9" | | Special Feature | Lightweight | | Special Features | Lightweight | | Style | Modern | | Theme | Sport | | Unit Count | 1 Count | | Warranty Description | no | ## Product Details - **Age Range (Description):** Adult - **Blade Material:** Stainless Steel - **Brand:** GOOD WORKER - **Color:** 1. Black - **Handle Material:** Stainless Steel - **Included Components:** No - **Model Name:** K19B - **Recommended Uses For Product:** Training - **Special Feature:** Lightweight - **Style:** Modern ## Images ![Black Practice Trainer with Durable Build – Safe Cool Design – Training Tool – CSGO Fidget Toy – Perfect for Man, Boyfriend, Father, Son, Teens – Birthday Gift Idea K19 B - Image 1](https://m.media-amazon.com/images/I/71pEiQGsxoL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great for beginners and smooth to flip *by A***A on July 7, 2025* I got this trainer butterfly knife to safely learn tricks without worrying about cuts, and I’m really happy with it. It’s well-balanced and has a solid feel—surprisingly sturdy for the price. The handles flip smoothly, and the weight makes it easy to practice without feeling too heavy or too light. The "blade" is blunt and safe, which is perfect for beginners (or parents of kids who are into this stuff). No sharp edges, but it still looks cool and gives a realistic feel. I’ve dropped it more times than I can count, and it’s holding up really well—no loose screws or major damage. The latch works fine, though it can get in the way during tricks sometimes (nothing a rubber band or quick mod can’t fix). Great choice if you're just getting into flipping or want a safe way to practice without risking your fingers. Fun, durable, and definitely worth it. Great for kids too! ### ⭐⭐⭐⭐⭐ It was on time *by K***E on September 25, 2026* It was good ### ⭐⭐⭐⭐⭐ A little tight *by W***. on July 25, 2026* The I got one came a little tighter than the other two trainers I bought from the brand, but the weight is still consistent with this brand. I'll keep working it to loosen it up but overall I'm still satisfied. ## Frequently Bought Together - Butterfly Knife - Balisong Trainer - Black Practice Butterfly Trainer with Sure Spring Latch - Balisong Knives NOT Real NOT Sharp Blade - Full Stainless Steel Fake Dull Trick CSGO Fidget Toy K19 B - Butterfly Knife - Balisong Trainer - Black Practice Butterfly Trainer with Sure Spring Latch - Balisong Knives NOT Real NOT Sharp Blade - Full Stainless Steel Fake Dull Trick CSGO Fidget Toy K10B - GOOD WORKER Butterfly Trainer - Practice Sword NOT Real - Balisong NOT Sharp Blade - Cool Design - Black Dull Trick Butterfly - Butter Fly Training - Gifts for Men Boys Girls K14B --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/539557125-black-practice-trainer-with-durable-build-safe-cool-design-training](https://www.desertcart.hr/products/539557125-black-practice-trainer-with-durable-build-safe-cool-design-training) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-10-12*