Amana Tool Flush Trim 'V' Groove Router Bits Option:47164 Compression 1 2 Dia x 1 Inch x 1 4 Shank w Upper And Lower Ball Bearings These blades feature Diablo made These blades feature Diablo made TiCo Hi Density Carbide engineered exclusively to deliver maximize life Includes three rounding over bits and a 3 8" bearing which will convert all three bits into beading bits for the ultimate in value it is possible to cut from either direction using only one template and without moving the template to the other side of the work piece This is especially useful when cutting curves which run both with and against the grain