Machinist Calc Pro

The Model 4087 Machinist Calc Pro from Calculated Industries is a machining math and reference tool. The calculator has dedicated keys for quickly calculating speeds and feeds, solving right-triangle math, determining bolt pattern-hole layouts and making three-wire measurements. Built-in drill and thread size tables are compliant with ANSI/ASME B1.1-2003 and ANSI/ASME B1.13M-2005. The calculator converts between inch and metric units. It comes with a shock-resistant case to protect against moisture and dust.