BOSCH SDC4 Turbo Step Drill Bit, 1/4 to 7/8 in Drill, 15-Hole Size, 1/4 in Min Hole Size, 7/8 in Max Hole Size, HSS Storage Bins & Boxes Cuts fiber cement quickly while

Cuts fiber cement quickly while producing less dust

Coarse "V" splines which cuts better

9-3/8 in Interior Width

Cotton/Polyester Lining

BOSCH SDC4 Turbo Step Drill Bit, 1/4 to 7/8 in Drill, 15-Hole Size, 1/4 in Min Hole Size, 7/8 in Max Hole Size, HSS Storage Bins & Boxes Cuts fiber cement quickly whileBOSCH Turbo Step Drill Bit, 1 4 to 7 8 in Drill, 15 Hole, 1 4 in Minimum Hole, 7 8 in Maximum Hole, 2. 56 in Overall Length, 3 8 in Shank Diameter, HSS, Additional Information: 1 8 in H x 5 32 in D Step, 2 in L FluteFeatures: Cordless step drill bit design made for smooth drilling in cordless drills using high speed and low speed mode, with 2X cutting edges and optimized angles on the bit steps 2X longer life and clean holes designed for burr free