Calculated Industries 4087 Machinist Calc Advanced Machining Math and Reference Tool The Machinish Calc Pro combines all the most-needed machining calculations with step-saving chart look-ups This item belongs tolevels Item is manufactured in China Speeds and Feeds  calculate for milling, turning and drilling; cutting speed, spindle speed (RPM), feed rate (IPM), cutting feed, feed per tooth/chip load Built-in Advanced Drill and Thread Size Tables  save time and steps (Compliant with ANSI/ASME B1.1-2003 and ANSI/ASME B1.13M-2005) Right Triangle Math  plus trigonometric functions, work in and convert between U.S. and metric units Bolt Pattern Hole Layouts  enter start angle, number of bolts, diameter and optional x, y offset; calculate x and y coordinates 3-Wire Measure  enter Wire Size (or use calculated Best Wire size) and 3-Wire Measurement to calculate pitch diameter