1、Good Quality Steel Material: Made of good quality steel material, fast and easy to use, possess high strength, good toughness, uniform material bring high working reliability 2、Replace Or Repair Damaged Or Missing Bearings: Milling cutter bearing replacement kit can be used to replace or repair damaged or missing router bit bearings 3、Compact Shape: This router bit bearing come with compact shape, easy to carry, convenient for you to store and use 4、For Milling Cutter Heads And Tool Holders: Durable steel bearing accessories are suitable for milling cutter heads and tool holders, very practical 5、28.6mm Bearing Diameter: The bearing diameter is 28.6mm, equipped with screw and hex wrench for easy installation and disassembly