Feature: 1. ALUMINUM ALLOY MATERIAL: The collar is made of high quality aluminum alloy material, with the high hardness, wear resistance and durability 2. SOLUTION METHOD: Provides non destructive solution for fixing parts to shafts or shafts, using clamping to fix parts, 16mm for fixing components to other parts Grid 4pcs 4mm through hole fixing mechanism and clamping mechanism for fixing the high speed shaft clamp to the shaft 3. DOUBLE CLAMP BOLTS: The double clamp bolts can be tightened to the shaft without worrying about distortion of the through hole spacing required to mount the assembly to other parts due to tightening the clamp mechanism 4. INSTALLATION: When installating, can fix to the gear, sprocket, pulley or wheel first, and then the component is fastened to the shaft. No matter where installed, the shaft clamping mechanism can work 5. INSERTION GROOVES: Since fixing mechanism and the clamping mechanism are completely independent, the diameter of the outer contour is 32mm, can be installed into grooves of part and the bearing of 32mm, installed in places where other types of clamps cannot be installed 6. 4 UNIVERSAL HOLES: With 4 universal holes on the 16mm robot grid pattern, the through holes allow you to fasten to parts with threaded holes Specification: Item Type: Clamping Collar Material: Aluminum Alloy Center Hole Shape: Round Center Hole Diameter: Approx. 8mm / 0.31in Thread: M4 Purpose: Fix the part to the shaft or the shaft by means of clamping. Package List: 1 x Clamping Collar Note: Before installation and use, need to match the appropriate design size