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)

Norton 66261014793 - 3" Medium Grade Aluminum Oxide Bear-Tex Speed-Lok High Strength Maroon TR Non-Woven Abrasive Disc, 80 Each
3M 15943 Scotch-Brite Surface Conditioning Low Stretch Belt, SC-BL, A/O Medium, 2 in x 18-15/16 in, 7010329255
Dynabrade 78122 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
3M 77791, Textured Surface Applicator TSA-1, For Large Surfaces, 1 Ea/Case, 7000005251
Standard Abrasives 42536, A/O Flap Wheel 661605, 6 in x 2 in x 1 in 60, 7010368978, 5 per case
3M 26583, Accuspray Refill Pack for PPS Series 2.0, Green, 1.3 mm, 7100152953 