An important tool to have in every machinist's hand. The app includes a lot of information and calculations required in every day shop use. Tapping, drill sizes, feeds speeds for various materials including roll form taps. Three-Wire Thread Measurement including Buckingham Involute Helicoid Formula (Exact Formula) found nowhere else. Combination Drill & Countersink depth calculator from #00 through #10 sizes. Spot Drill Depths for various tool angles. Chart of Collet types, sizes used in CNC Milling holders ordered from best to worst. Cusp height calculation for ball nose end mills with RMS values. SFM to RPM and vise versa based on cutter diameter. Sine Bar / Sine Plate calculation. Gage Block Stack Height List, can be used with the sine bar calculator. Bolt Circles with X Y coordinates. Right Triangle solver. Cubic and square roots Material Hardness Material Machinability Heat Treat Growth Weight of basic shapes (angle, rectangle, hex, round, pipe, tube) per material and length, good for planning and quoting. Plating and Anodizing specifications with size change for build up. Schedule Pipe sizes. Sheet Metal Gages. Thermal Expansion of materials. Chamfer Mill calculator to achieve desired chamfer size. Reamer Drill Size Basic screw dimensions and clearances. Flathead, shoulder bolts, low head and standard socket head.