DOUBLE SIDED TOOL: This guide features a Tap Drill Depth Chart, decimal conversions from 1/64" to 63/64" and a ruler graduated in 64ths
FRONT SIDE: Front side has a machine screw size tap drill chart for recommended 75% depth thread.
BACK SIDE: Features a decimal equivalents table in 64ths from 1/64" to 63/64".
6 INCH RULER: Graduated in 64ths.
WORKS WITH: National Fine, National Course, American Standard Pipe and metric threads.
ESSENTIAL TOOL: Essential tap drill and decimal equivalents reference table for toolmakers, machinists and mechanics.
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.