Chamfering (chamfer) & Profiling router bits are made by Amana Tool, the leading manufacturers of cutting tools. Cut channels for pipes or cables using Amana Tool RC-1126 Carbide Tipped CNC Ball End Insert Router Bit 1/2 R x 1 Inch D x 1/2 CH x 1/2 SHK. The profile requires the cut to be made in a single pass. To reduce stress on the bit, cut an initial groove using a straight bit matching the D1 dimension of the ball end bit. SPECIFICATIONS: (D) Diameter: 1; (R) Radius: 1/2; (B) Cutting Height: 15/16; (d) Shank: 1/2; Overall Length (L): 2-7/8; Max RPM: 18,000; Screw #: 67115; Replacement Knives: RCK-54; Flutes: 2; D1: 43/64.