With transverse and longitudinal vials
Used as level and slope meter to measure the angle of two separate surfaces
Aluminum frame
Magnetic bottom
The sea level is permanently set inside the chip, zero setting is not needed when batteries are replaced
Buttons: ON/OFF, absolute and incremental measurement, keep the reading, buzzer alarm(not for 4910-400), unit (mm/m, %, in/ft), conversion(not for 4910-400), backlight
The display flips over when the bottom faces up

Insize 3203-33A, OUTSIDE MICROMETER SET W/CASE, 0-3", 6928640327193
Standard Abrasives 701656, Cartridge RoII Mandrel, 3/16 in x 2 in x 1/4 in x 1-1/4 in x 4 in CM-18, 7010368730
3M 62612, Scotch-Weld Threadlocker TL71, Red, 10 mL Bottle, 7100039197, 10/case
Dynabrade 95848 Dynabrade Gear Oil
ACS Diamond Cloth Belt, CX1250 3/4" X 18" 250U
Standard Abrasives 42621, A/O Flap Wheel 621406, 1 in x 1 in x 1/4-20 in 80, 7010369106, 10 per case
3M 01302, Scotch-Brite Cut and Polish Flap Brush, 12 in x 1 in x 5 in 7A MED, 7100054509 