These slot cutters, featuring three wings, can create rabbets, grooves, biscuit slots, and mill tongue and groove stock. They also route grooves for T-molding. Our slot cutter router bits, complete with arbors, come with a 5/16 x 7/8 bearing (BR-105) for a standard 1/2 depth of cut. Inner Diameter: 5/16 Outer Diameter: 1-7/8 Cutting Depth: 1/2 For 3/8 Depth: 1-1/8 Bearing (BR-116) For 5/16 Depth: 1-1/4 Bearing (BR-117) For 1/4 Depth: 1-3/8 Bearing (BR-118) Size Name 1.875 x 0.5 Brand Name Infinity Cutting Tools