CREATE PERFECT PILOT HOLES: Two heavy-duty bits create pilot holes in cabinet and door hinges SELF-CENTERING DESIGN: Spring loaded, outer guide keeps the high speed drill centered ADJUSTABLE & DURABLE: Adjustable drill depth and high speed steel construction TWO BIT SIZES: 7/64" bit is compatible with screw sizes no. 5 and no. 6; 9/64 " bit is compatible with screw sizes no. 8 and no. 10 GENERAL TOOLS: We're a recognized leader in designing and developing specialized precision tools dedicated to delivering exceptional customer service. We encourage artisans and DIYers to work smarter, measure better, and repair more productively.