Features: Small and light, easy to carry, we use laser- cutting, Brushed finish, build to resist daily corrosion, catches, and tarnishing. It fits onto most tape measures and does the job quickly and easily. The three installation slots in the middle can be adjusted and installed according to the size of the tape measure. Remove the screw in the middle of the tape measure. Adjust tape measure marker alignment. Tighten the screws and fix it. Install the pencil and fix it, the installation is complete. You can use them to draw arc-, measurement marks, draw circles, and draw straight lines. The tape measure marker tool is a very good solution. Applicable for pencil diameter equal or less than 8mm, tape radius- equal or less than 60mm. Specifications: Material: alloy Size: approx 80x31mm/3x1.2-inch Note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Tape Measure Marker