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 8911-20KGF1S, WEIGHT _20kg, 6940561906837
3M 34786, 663FC, 3/4" X 90", 70u, Diamond Trizact Belts 7100063667
3M 16159, PTFE Glass Cloth Tape 5453, Brown, 3/4 in x 36 yd, 8.2 mil, 7000050132
3M 50728, Hookit Purple+ Curved Adapter Set Multi Hole, 70 mm x 127 mm, 7000032209
3M 19764, Utility Cloth Sheet 314D, 9 in x 11 in P320 J-weight, 7000000352
Standard Abrasives 875000, Buff and Blend Flap Brush, 6 in x 1 in x 2 in FB072 15-87 A VFN Medium Density, 7010330870 