The New Elcometer 415 *Automotive Version* Paint and Powder Coating Thickness Gauge for steel & aluminum car panels, 0-40 mils, + - 1 - 3%, .10ths of a Mil: Simple, fast & very accurate coating thickness measurements. Automatically switching between ferrous & non-ferrous metal substrates. Works in both mils and microns. Compatible with ElcoMaster® software and ElcoMaster® Mobile App, individual paint and powder thickness readings can be transferred via USB or Bluetooth® to PC or a mobile device for analysis and instant report generation.