Convenient Self Sharpening Design: The carpenter pencil features an innovative built in pencil sharpener, allowing the leads to stay keen at all times. This user centric function ensures you can always draw precise and clear marking lines, significantly boosting work efficiency Smart Adjustable Stop Design: The innovative sliding stop block operates smoothly and locks securely, facilitating repeated measurement and marking tasks. This user friendly design greatly improves work efficiency, especially suitable for DIY projects and woodworking tasks that require batch processing Dual Scale Precise Graduations: The front and back sides of the multi functional scribing ruler are marked with inch and millimeter scales respectively. The clear graduations are wear resistant , ensuring measurement accuracy is maintained even after long term use, and meeting the needs of users with different measurement habits Military Grade Quality: The multi functional scribing rulers are made of great aluminum alloy, undergoing CNC precision machining and anodized finishing , which provides excellent rust resistance . The sturdy structural design ensures measurement accuracy remains consistent even after thousands of uses, delivering long lasting durability Professional Grade Measuring Set: This multi functional marking tool kit includes 3 high precision metal rulers (160mm, 200mm, 300mm / 6 inch, 8 inch, 12 inch), 1 leads carpenter pencil, and 12 complementary refill leads (6 red + 6 black) Color: As Shown Material: Metal Package Contents: 1*set architectural scale ruler