This is the basic Rabbeting bit. It cuts 3/8" Wide and up to 1/2" Deep. Switch to one of four optional ball-bearing guides to alter the width of cut. Use in a handheld or table-mounted router., #49302 diameter (D) 1-1/4, cutting Height (B) 1/2, shank (D) 1/2, overall length (L) 2-3/8, replacement bearing 47706, flutes 2, C 3/8, 49302 Rabbeting 3/8 depth x 1-1/4 dia x 1/2 x 1/2 inch shank