LBK Boring Extension Reducer 1.Used on boring machine 2.For deeper boring 3.Suit for LBK shank 4. ... tools to all over the world, such as carbide inserts,machine tool holder,collet chuck,drill chuck.turning tool,lathe holder ... ,tool holders,drills,u drill,nuts,wrenches,screws and other machine accessories etc. And we have obtained good reputation in the ...