

⚓ Master your rigging game with Ronstan’s sleek, swivel-smart ratchet block!
The Ronstan Series 55 Ratchet Orbit Block features a fixed ratchet mechanism combined with a 360° swivel head, crafted from durable powder-coated plastic. Compact and lightweight at 15 cm and 0.08 kg, it offers precise mechanical operation ideal for professional sailing or rigging applications. Backed by Ronstan’s trusted brand warranty, this single block is engineered for smooth, reliable performance in demanding environments.
| Color | Black |
| Brand | Ronstan |
| Material | Plastic |
| Item Length | 15 Centimeters |
| Item Weight | 0.08 Kilograms |
| Item Package Quantity | 1 |
| Head Style | Fixed Ratchet |
| Finish Type | Powder Coated |
| Operation Mode | Mechanical |
| Manufacturer | Ronstan |
| Global Trade Identification Number | 09316800440375 |
| Item Package Dimensions L x W x H | 5.51 x 3.54 x 1.57 inches |
| Package Weight | 0.24 Kilograms |
| Item Dimensions LxWxH | 2 x 3 x 1 inches |
| Brand Name | Ronstan |
| Warranty Description | Warranty |
| Model Name | RF56100 |
| Suggested Users | unisex-adult |
| Number of Items | 1 |
| Part Number | 56100 |
| Model Year | 2015 |
| Included Components | Great Product |
| Size | One Size |
I**N
Satisfied
Nice smooth operation. In auto mode, works very nicely for the mainsheet on my sunfish.
D**D
Auto Ratchet block
It's a very light piece of hardware. I hope it holds up for a J24 spinnaker sheet trimming block... we'll see
C**N
only regret, not buying this sooner
This has been an awesome edition to my sunfish as the main block. I was using a worn out competitor and my hands hurt terribly after sailing on windy days. This block has great teeth that hold and give your hands a break, but will allow you to let out the mainsheet without problems.Worth every penny.
D**.
As advertised
Exactly what it does.
Trustpilot
3 days ago
1 month ago