The ruler body is composed of an aluminum alloy ruler and a compass limit block. The limiter and the ruler are made of aluminum alloy, the is anodized, wear- and anti-rust, and the touch is comfortable. The limit block is composed of a black aluminum alloy low plate + a silver rotating disc, and the rotating disc is integrated with a pointer! Laser-marking, clear reading, compass rotation, fast positioning! Aluminum alloy ruler, metric and imperial double scale marks, flexible to use! Traditional compass , can measure 0-360 degree angle and draw a line! The ruler body is ergonomically designed to reduce the pressure on your elbows or wrists! Material: alloy colour: red Package Contents: 1 x carpentry compass ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. The ruler body is ergonomically designed to reduce the pressure on your elbows or wrists! Laser-marking, clear reading, compass rotation, fast positioning! Aluminum alloy ruler, metric and imperial double scale marks, flexible to use! Traditional compass design, can measure 0-360 degree angle and draw a line! The limit block is composed of a black aluminum alloy low plate + a silver rotating disc, and the rotating disc is integrated with a pointer! The ruler body is composed of an aluminum alloy ruler and a compass limit block. The limiter and the ruler are made of aluminum alloy, the is anodized, wear- and anti-rust, and the touch is comfortable.