Specification Brand : Yuecoom BulletPoint1 : [Axle Fixation] SBR linear rail collar is used for DIY CNC machine tools, ensuring accurate positioning and fixation of the axle. BulletPoint2 : [Easy Installation] The clamping shaft collar design fully grasps the axle without damaging the appearance. Easy to install, otherwise require large scale disassembly. BulletPoint3 : [Aluminum Alloy Material] Made from premium aluminum alloy material, lightweight yet durable, with excellent resistance to oxidation and erosion. BulletPoint4 : [Secure Fastening] The axle can be tightly clamped with fixing screws, ensuring a secure grip without causing damage. And ensures a stable operation. BulletPoint5 : [Long Lasting Performance] With its robust construction and reliable fixing capabilities, the SBR linear collars provide long lasting performance, making it a reliable choice. ItemName : Yuecoom 4pcs SBR Linear Rail Shaft Stop Collars, Aluminum Alloy Shaft Limit Fixing Rings Parts with Set Screw Bore 20mm OD 40mm Thickness 12mm ItemPackageQuantity : 1 ItemTypeKeyword : clamp-on-shaft-collars Manufacturer : Yuecoom PartNumber : Yuecoomtbuhqe18so ProductDescription : Description: These shaft guides are suitable for transmission products, linear rail modules, engraving cutting machines, and various precision instruments.