1、Dust Proof: Fine workmanship, metal guards on both sides can prevent dust and wood chips from entering the bearing to extend the service life of the machine. 2、Premium Material: The cutter head bearing is made of premium steel, with high hardness, not easy to deform and damage, and has a long service life. 3、Good Replacement: Used to replace or repair damaged or missing milling cutter upper bearings, with good matching and stable working performance. 4、Sufficient Quantity: A total of 3 sets of replacement bearing accessories are included, which can fully meet your needs, very convenient and practical. 5、Easy To Use: The kit contains screws and wrench to help you install and remove the bearings better and quickly, which is easy to use and save time and effort.