Standard Abrasives 709966, A/O Tapered Cone Point, B-20 180, 7010368591, 100 per case 
Insize 1121-5002, DIGITAL INSIDE POINT CALIPER, 80-500mm/3.15-20″, 6928640385018
$843.95
Resolution: .0005″/0.01mm.
Measure groove diameter.
Buttons: on/off, set, inch/mm, preset (+, -).
Automatic power off, move the digital unit to turn on power.
Battery CR2032. Data output.
Made of stainless steel.
Optional accessory: depth stop (part no. 6143), data output cable
