3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832 
Insize 1145-25A, MINI DIGITAL DEPTH GAGE, 0-1″/0-25mm, 6928640303470
$106.58
Resolution: .0005″/0.01mm.
Measure depth of small groove and hole, also measure depth of tire tread.
Buttons: on/off, zero, inch/mm.
Supplied with zero set surface.
Automatic power off, move the digital unit to turn on power.
Battery CR2032, data output.
Made of stainless steel.
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