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

Dynabrade 59391 Housing for Model # X61VHS
Dynabrade 79195 3-1/2" W x 15-1/2" L 36 Grit DynaCut Premium Ceramic Belt, 10/pack
Dynabrade 02651 Bearing
Dynabrade 93095 3" Dia. x 80 Grit Premium Ceramic Non-Vacuum DynaCut, Locking-Type Disc, 3 Ply Cloth, 25/pack
Dynabrade 51226 2" Dia. Right Angle Disc Sander, Self-Generated Vacuum, 15,000 RPM
Dynabrade 54807 Drop-In Motor
Dynabrade 13300 Mini-Dynisher Finishing Tool, .4 HP, Rear Exhaust, 3,200 RPM, 5/8" Arbor
Dynabrade 18570 Vane Set (4pk)
Dynabrade 54629 Rear Bearing Plate
Dynabrade 96241 Bearing Press Tool
Dynabrade 90595 1-1/2" W x 30" L 320 Grit A/O DynaCut Belt, 50/pack
Dynabrade 54744 4" (102 mm) Dia. Right Angle Type 1 Cut-Off Tool, Steel Housing, .7 HP, 13,500 RPM, 3/8"-24 Spindle
Dynabrade 93343 Carbide Burr, 1/8" Dia., SE-41 D/C Burr, Oval, 7/32" Flute L, 1/8" Shank
Dynabrade 90451 1/2" W x 24" L 220 Grit A/O DynaCut Belt, 50/pack
Dynabrade 91246 8" Dia. x 220 Grit A/O Vacuum PSA DynaCut Disc, 25/Box
Dynabrade 59178 6" Dia. Dynorbital-Spirit Random Orbital Sander, Non-Vacuum, 3/8" Orbit
Dynabrade 57736 - 8" Overskirt
Dynabrade 53233 6" (152 mm) Dia. Type 11 Vertical Cup Wheel Grinder, 2 HP, 6,000 RPM, 5/8"-11 Spindle
Dynabrade 92203 1-1/2" W x 30" L 120 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 96746 General Purpose Cleaning Kit
Dynabrade 96100 Motor Tune-Up Kit
Dynabrade 02089 Drop-In Motor
Dynabrade 51411 7 Degree Offset Mini-Dynorbital Random Orbital Sander
Dynabrade 13506 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 3,400 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade 15368 Contact Arm Assembly, 1" Dia. X 1" W, Serrated Wheel
Dynabrade 93380 Carbide Burr 8-Piece Burr Kit, 6mm Shank
Dynabrade 79829 DynaBolt AO SS 7" x .045" x 7/8" T42 Right Angle 