1、The center scriber is made of aluminum alloy and the tip is 45# steel, which is hard and durable. 2、It is used to determine the exact position of the center of the board during board cutting, pin joint and assembly. 3、The tip can be removed with a hex socket screw, and a 10mm thick pen can be put into the inner hole for marking. 4、High quality aluminum alloy structure ensures long service life, easy to install and use, easy to carry. 5、Practical woodworking auxiliary tool for professionals use, brings much convenience for your work. 1 x Center Scriber1 x Hex Wrench1 x Screw1 x Positioning Column Condition: 100% Brand NewItem Type: Center ScriberMaterial: Aluminum Alloy + 45# SteelMeasuring Range: Less Than 95mmMeasurement Accuracy: 1mmScope of Application: Woodworking Marking ToolColor: Red, Blue (optional)Total Length: Approx. 120mm / 4.7in