One counter reads in the plus direction and another in the minus directiion, so incremental measurement can be made in either direction
Carbide tipped scriber
Made of stainless steel (except the base).
With driving wheel. With dial test indicator holder.
Supplied with dust cover
Optional accessory: clamp for protracotors (code 2372-CLAMP)

3M 69602, Cloth Belt 777F, 60 YF-weight, 1 in x 11 in, Sine-lok, Full-flex, 7010295223, 500 per case
Insize 7230, SCRIBER, 6928640320064
3M 14211, Roloc Disc Pad TS and TSM, Medium 2 in 1/4-20 Internal, 7000045283
Norton 66261127733 - 2" X 50 Yard 60 Grit Metalite™ Aluminum Oxide Cloth Roll, 1 Each
Standard Abrasives 875709, HS Mini-Brush, 4-1/2 in x 2 in x 5/8-11 FB018 41-42 A CRS Medium Density, 7010369379
3M 55701, Stikit Film Disc w/Tab 375L, P180, 6 in x NH, Die 600Z, 7100106619, 250 per case
3M 86804, Cubitron II Stikit Film Disc 775L, 80+, 6 in x NH, Linered w/Tab, Die 600Z, 7100045866, 250 per case
3M 33446, Cubitron II File Belt, 80+, 1/2 in x 18 in (12.7 mm x 457.2 mm), 7100033186, 10 belts per carton, 5 cartons per case 