Product Info Catalog Tools Power Drill, Bits & Accessories 1.25 x .5-In. Mortising Router Bit 1.25 x .5-In. Mortising Router Bit Request a Quote UPC: 08925380320 SKU: 646016 Model Number: 16-106 1-1/4" Diameter x 1/2" Carbide Height, Mortising Router Bit, 1/4 Shank, TiCo&tm. High Density Carbide.