Check the listing for details. 2Pcs CF3/KR10 PPX M3 Stud Needle Roller Stud Track Bearing (Hexagon Socket). Condition: New. Listed at 20.15 USD. Description:Material - The cam bearing is made of 440 stainless steel, which has high strength, is rust-proof, corrosion-resistant, not easy to break or deform, and can be used for a long time.Design - The outer ring of the cam bearing follower is a curved surface structure with a sealing ring inside. It is composed of an outer ring cage pressed into the rolling element for axial guidance and a stepped flange, forming an efficient gap seal to prevent dust and other foreign matter from entering, thereby extending the service life of the needle roller bearing. How to Use - This cam follower bearing has the hex socket machined on the stud head and can be installed by using the hex wrench to screw it into the machine, and then tightening the matching nut.