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 4102-181, STEEL GAGE BLOCK SET, 81pcs, grade AS-1, 6928640329906
ACS 1/2 in x 18 in Diamond Metal Bond Belt, 120M/125u
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 19764, Utility Cloth Sheet 314D, 9 in x 11 in P320 J-weight, 7000000352
3M 14588, Scotch-Brite Roloc+ Cut and Polish Flap Brush, 3 in x 1-3/8 in, A MED, 7100088221 