Angle meter with vial and movable arm 250 mm • made of resistant ABS plastic • movable arm 250 mm long, locked with screws • movable vial that we can mount on the protractor arm • clearly marked scale • millimeter and inch graduation on the movable arm and angle graduation every 1° on the circumference • black marking on a yellow background superbly improves visibility Designed for measuring angle values For discerning do-it-yourselfers and craftsmen.