Available for drawing 45 / 90° Angles, vertical line and drilling positioning, can also be used for positioning platform height Ruler have a widened base, when you fix screws, cut, or draw lines, fit the base to edges of the wood, ruler is not easily slide Provide double stability to ensures accuracy of work Adopts aluminum, strong structure, not easy to deformation, can maintain accuracy Easy to hold with hand for long time All scales are in units Accurate and clear spacing, easy to read, long time without wear Comes with different diameter holes, this square can matching a variety of mainstream screw size Find the right hole in a second, then fix the screw for drilling work, Manufacturer: Hrtyvhin