The 1528 Insize Digital Vernier Caliper with Interchaneable Ball Tips. The Caliper is made from stainless steel for longer tool life and durability from machine stop ware. With optional SPC cable data output, measurement can range upto 300mm (12) . Resolution 0.01mm/0.0005". Buttons: on/off, set, mm/inch, preset (+, -) . Automatic power off (move digital unit to turn on) . Battery CR2032. Data output. Made of stainless steel. Optional accessory: ball tips (1527) , data output cable (code7302-SPC5A) .