ANGLE, ANGLE COMPLEMENTARY : Bevel blocks allow you to set an adjustable bevel square as a physical reference instead of trying to visually match it to a mark. Miter blocks instantly give you 1:6, 1:7, and 1:8 dovetail angles, as well as miter angles of 15°, 22-1/2°, 30°, 36°, and 45° CLEAR VIEWING: Supplementary angles are especially useful for table saws. The 45° angle between the blade and the table is narrow and difficult to see, but on the other side of the blade the 135° angle is large and easy to see Switch the side opposite the beveled square from right to bottom and you'll get 90° supplementary angles for all angles. This technique is great for laying out shelf brackets and other projects that require two cuts totaling 90°. Portable Size: Bevel Block Gauge measures . 25.4x63.5x38mm/1x2.5x1.5inch, made of aluminum alloy, light and easy to carry Supplementary angles are especially useful for table saws. The 45° angle between the blade and table is narrow and difficult to see, but on the other side of the blade, the 135° angle is large and easy to see. Place the right side of the bevel block on the saw table and adjust the bevel to the complementary angle. Now you can set up your saw for bevel cuts faster and easier than ever. Colour:Red Material:alloy Package Contents: 1 * Angle ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.