Amana Tool Industrial quality Carbide Tipped laminate trim bits with the Euro square bearings. The bits are designed according to specifications with a slight taper allowing for adjustment up or down on the work edge to finish off the edge with a smooth and burr free cut. The square bearing is manufactured with a strong Non-Stick Teflon which wont mark your edge so it can be wiped clean easily., #47147, diameter (D) 1/2, cutting Height (B) 19/64, shank (D) 1/4, overall length (L) 1-3/4, replacement bearing Sqb100, flutes 2, 47147 carbide Tipped laminate Trimmer with Euro square bearing 1/2 dia x 19/64 x 1/4 inch Shank router bit