Application: Ruler positioning block is suitable for all kinds of steel rulers not easy to fall off adjustable pressure block convenient and efficient to use Size parameters: Applicable ruler width is about 20-30 mm/0.79-1.18 inches and the thickness is about 2 mm/0.08 inches making the operation more precise Efficient: Just move the ruler to the required scale and tighten the screw Easy to use and efficient can help woodworkers improve efficiency save time and effort Practical: Woodworking scribing measuring positioner is a necessary hand tool exquisite and compact and easy to carry Accurate: With woodworking locator you can easily draw a 45-degree 90-degree line flexible adjustment no damage to the ruler easy to use