Perfect Shaft Positioning - Designed for linear guides, ideal for DIY CNC projects Quick & Easy Installation - Clamp-on design ensures a secure fit with minimal effort & - Made from - aluminum alloy for long-lasting use Secure Hold, No Damage - Set screws a tight grip without harming the shaft 4-Pack Set - Includes 4 shaft collars for a complete, ready-to-use solution The Shaft Collar is a high-quality stop collar designed for use on linear rails and motion guide shafts. With a bore of 20mm, outer diameter of 40mm, and thickness of 12mm, it offers precise positioning and secure clamping for industrial applications. This aluminum alloy shaft collar is , rust-, and features an set screw for easy adjustment. Ideal for CNC machines, 3D printers, and automation systems, the clamp-on design ensures a firm grip, preventing slippage. Perfect for linear motion systems, it enhances stability and accuracy during operation. Type:D:SBR20 Colour:As Shown Material:Metal Package Contents: 4 * Shaft Collar Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.