5/16 in. SHOCKWAVE™ Carbide Multi-Material Drill Bit Propane Accessories the cross bore should be

the cross bore should be 2-1/8 inches in diameter and the edge bore should be 1-inch in diameter

For interior doors

Cool Riser Technology Improves Cooling Performance By Elevating Away From Hot Surfaces

1/2" x 1/2" x 1/2"

Lubricates and protects threads

5/16 in. SHOCKWAVE™ Carbide Multi-Material Drill Bit Propane Accessories the cross bore should beMILWAUKEE 5 16" SHOCKWAVE Carbide Multi Material Drill Bits are the most versatile bits, designed to tackle a variety of materials, including brick, block, concrete, steel, aluminum, ceramic tile, backerboard, wood, PVC, and drywall. The aggressive multi grind carbide tip delivers up to 10x longer life in stacked materials and up to 85% faster drilling speeds in metal. Equipped with a 1 4" hex shank, these general purpose drill bits are compatible