--- product_id: 69980622 title: "QISF Set of 4 Square Hole Bits, Hollow Steel Bendanes Woodworking Tools Set (1/4-1/2-5/16-3/8 Inch)" brand: "qisf" price: "€ 53.42" currency: EUR in_stock: true reviews_count: 8 category: "Qisf" url: https://www.desertcart.hr/products/69980622-qisf-set-of-4-square-hole-bits-hollow-steel-bendanes store_origin: HR region: Croatia --- # 4 sizes: 1/4" to 1/2" Precision wood drilling HRC48~50 hardened steel QISF Set of 4 Square Hole Bits, Hollow Steel Bendanes Woodworking Tools Set (1/4-1/2-5/16-3/8 Inch) **Brand:** qisf **Price:** € 53.42 **Availability:** ✅ In Stock ## Summary > 🛠️ Drill like a pro, finish like a boss! ## Quick Answers - **What is this?** QISF Set of 4 Square Hole Bits, Hollow Steel Bendanes Woodworking Tools Set (1/4-1/2-5/16-3/8 Inch) by qisf - **How much does it cost?** € 53.42 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/69980622-qisf-set-of-4-square-hole-bits-hollow-steel-bendanes) ## Best For - qisf enthusiasts ## Why This Product - Trusted qisf brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Size Range:** Four essential bit sizes (6.35mm to 12.7mm) cover all your woodworking mortise needs. - • **Seamless Compatibility:** Fits all mortising machines and drill press attachments for professional-grade results. - • **Engineered for Endurance:** High-speed steel with heat treatment ensures long-lasting sharpness and durability. - • **Effortless Mortising Mastery:** Cut perfect square holes faster and cleaner—ditch tedious chiseling. - • **Boost Productivity & Cut Costs:** Speeds up construction and renovation projects while reducing labor intensity. ## Overview The QISF 4-piece Woodworking Square Hole Drill Bit Set features high-speed steel bits with heat treatment (HRC48~50) designed for precision mortising in wood. Compatible with all mortising machines and drill press attachments, it includes four sizes from 1/4" to 1/2" (6.35mm to 12.7mm), enabling faster, cleaner square hole drilling that reduces labor and boosts efficiency in construction, installation, and renovation projects. ## Description Features: 1. Professional wood drill bit, suitable for construction, installation, renovation, decoration, etc. 2. The workpiece forms a hole drilled by the rotating body, while the impact of the use of the percussion force is transmitted to the outside of the body, the material creates a round hole and a square head, in one go, and the dust can be discharged through the tube. 3. The dimension refers to the length of the drilled square hole. 4. The cylinder diameter of the clamping portion is 19 mm. 5. The center of the drill hole is over 210mm, for longer drill centers. Specifications: Sizes: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm). Material: High Speed Steel DIY Supplies: Woodworking Use: Drilling/perforating wood. Package includes: 1 x 1/4" or 1/4" drill bit 1 x 5/16" or 7.95mm drill bit 1 x 3/8" or 9.5mm drill bit 1 x 1/2" or 1/2" drill bit Note: Please allow 1-3cm error due to manual measurement. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Thank you for your understanding. Sold by QISF (Quality Innovation Service First) Review: Great tool! - I bought these to make some mortice & tenon joints (the mortice part anyways). They appear to be good quality and at under £19 for 4 they are not a bad price either. The shank is 19mm which typically indicates these are for use in a drill press, you might be able to fit them in a hand drill, but hand drills are not really designed to assert the force needed for the outer square chisel part to cut out what the drill does not. Normally I would have used a Forstner bit to cut out most of the mortice and then cleaned up the edges with a chisel, using these square hole drill bits makes morticing so much quicker and easier! If you overlap the cutting area by about .5mm each time you have hardly no cleanup to do at the end, I found it best to work from both ends of the mortice at the same time alternating between the two so you end up with one final hole to drill in the middle. This gives you better support than trying to cut at the end of a hole and only having half the drill bit in contact with some wood. Also, if you can drill the hole a little bit deeper than the tenon requires, you don't even have to tidy up the bottom of the mortice! Review: Good product - Good product ## Features - 【DESIGNED】 Professional Great for drilling square holes in wood with a mortising machine or a mortising attachment.Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects. - 【MATERIAL & SIZE】 Made of high-speed steel. Heat treatment, HRC48~50, high hardness, lengthened core, high concentricity; 4 Different size include 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm) - 【WHY CHOOSE THIS ITEM】Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries. - 【PACKAGE CONTENT】 1Pcs 1/4" (6.35mm); 1Pcs 5/16" (7.94mm); 1Pcs 3/8" (9.5mm); 1Pcs 1/2" (12.7mm) - 【NOTE】The square hole punching needs to use electric drill, hammer & other tools.(All of these are not include) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07D73ZPY5 | | Best Sellers Rank | 132,699 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,110 in Drill Bit Sets | | Brand | QISF | | Country Of Origin | China | | Customer Reviews | 4.2 out of 5 stars 638 Reviews | | Cutting Angle String | 6E+1 Degrees | | Cutting Diameter | 12.7 Millimetres | | Cutting angle string | 6E+1 Degrees | | Cutting diameter | 12.7 Millimetres | | Finish Types | High-speed Steel | | Finish type | High-speed Steel | | Manufacturer | QISF | | Material | High Speed Steel (HSS) | | Minimum Bore Diameter | 6.35 Millimetres | | Number of Flutes | 3 | | Point Style | Centre Point | | Shank Type | Square | | Shank type | Square | | Surface Recommendation | Wood | | Tool Flute Type | Straight | | UPC | 712182899883 | ## Product Details - **Cutting angle string:** 6E+1 Degrees - **Cutting diameter:** 12.7 Millimetres - **Finish type:** High-speed Steel - **Material:** High Speed Steel (HSS) - **Shank type:** Square ## Images ![QISF Set of 4 Square Hole Bits, Hollow Steel Bendanes Woodworking Tools Set (1/4-1/2-5/16-3/8 Inch) - Image 1](https://m.media-amazon.com/images/I/61CB0L6Mp8L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great tool! *by T***G on 10 March 2025* I bought these to make some mortice & tenon joints (the mortice part anyways). They appear to be good quality and at under £19 for 4 they are not a bad price either. The shank is 19mm which typically indicates these are for use in a drill press, you might be able to fit them in a hand drill, but hand drills are not really designed to assert the force needed for the outer square chisel part to cut out what the drill does not. Normally I would have used a Forstner bit to cut out most of the mortice and then cleaned up the edges with a chisel, using these square hole drill bits makes morticing so much quicker and easier! If you overlap the cutting area by about .5mm each time you have hardly no cleanup to do at the end, I found it best to work from both ends of the mortice at the same time alternating between the two so you end up with one final hole to drill in the middle. This gives you better support than trying to cut at the end of a hole and only having half the drill bit in contact with some wood. Also, if you can drill the hole a little bit deeper than the tenon requires, you don't even have to tidy up the bottom of the mortice! ### ⭐⭐⭐⭐ Good product *by C***Y on 1 August 2025* Good product ### ⭐⭐⭐⭐⭐ Good solid quality. *by A***R on 5 November 2025* Good quality and work fine. ## Frequently Bought Together - QISF 4Pcs Woodworking Square Hole Drill Bits,Mortise Chisel Hole Saw Drill Bit Set 1/4-1/2-5/16-3/8 inch - Folpus Square Hole Drill Bit Adapter Bench Drill to Square Tenon Machine Converter Holder Square Hole Drill Machine Chuck Bracket Eyelet Accessories --- ## 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/69980622-qisf-set-of-4-square-hole-bits-hollow-steel-bendanes](https://www.desertcart.hr/products/69980622-qisf-set-of-4-square-hole-bits-hollow-steel-bendanes) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-24*