The secret to the T-shaped square is a series of precision-machined index holes and close-tolerance spring loaded index pins engaged with it. The spindle snaps into place, giving you the reassurance that it is precisely positioned. Even the most experienced carpenter faces the challenge of accurately placing the angle on a large panel project. You can try to relax the production line from a small protractor, but even a small error will make the production line extend further, the bigger the error. Our latest precision ruler can provide unmatched precision for your cutting jobs. layout of panels. Just tap the head at the desired angle, then tap the straight line. The head can be adjusted from 0 ° to 70 ° and is firmly locked every 5 ° (plus 22 -1 / 2 ° and 67-1 / 2 °) to provide you with precise reference angles and lengths respectively. It measures 10 inches Even if you don't use angles, this is a layout tool that can be used in almost any project. The blade has the same exclusive function of serration. Design notches are found in our new product. Precision stainless steel woodworking square. There is a notch every sixteen inches across the entire blade. Simply place the pencil in the notch and slide the head along the edge of the stock to get a perfect parallel line. Descriptions: Material: metal Color: silver Size: 10 inch / 15 inch / 20 inch Measuring range: the head can be adjusted between 0 ° and 70 ° Package including 1 * woodworking edge ruler Note: This is no 'not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the picture. item. Due to manual measurement. Please allow deviation. Thank you!