2. Rotatable knob:The rotary knob design facilitates adjusting the angle and position of the ruler, and is fixed at the desired angle and position. 1. Multi angle marking:Support multi angle marking at 15 °, 30 °, 45 °, 60 °, and 90 ° to meet the marking needs of different angles.By rotating the knob, the angle and position of the ruler can be easily adjusted to precise positioning. 4. Fixed point marking:Equipped with a fixed-point marking function, it facilitates precise marking on wooden boards. 3. Clear and precise horizontal bubble:Built in high- horizontal bubble, accurate measurement results, convenient leveling.Horizontal bubbles are highly transparent and easy to observe. 5. Limit mark:Equipped with a limit marking function to that the ruler does not slide during marking, maintaining the accuracy of the marking., Weight: 0.32187490252 Pounds, Manufacturer: Wesafrae