If you need a serious professional tool, I can't help you. I'm having too much fun with my new toy. Tried two others, disappointed. The monocular ($550) was too clunky with a small screen (I gave it to my son-in-law for hunting), and the smartphone plug-in ($750) seemed like a good camera, but the control program lagged like an airplane without fuel. This one works so well I hate giving it up.
π² Johnson RAS-1B Johnny Square: Professional Aluminum Rafter Square, 7'', Silver - Top Quality with 1 Square
8 Review
β Stainless Steel L-Square, Size 3-Inch x 4-Inch, Zona 37-434
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π CAMWAY 6 Inch Digital Caliper with LCD Display, Electronic Vernier Caliper, 150mm Stainless Steel Feeler Gauge, Plastic Digital Caliper Set for Zero Setting Inside/Outside Diameter, Depth, and Step Measurement Tool
3 Review
Kapro - 353 Professional Ledge-It Try & Mitre Square - For Leveling And Measuring - Features Stainless Steel Blade, Retractable Ledge, And Etched Ruler Markings - 12 Inch
23 Review