My dad has worked with precision tools my entire life. He loves to build shelves, birdhouses and more. This Angle Measurement tool was a great hit with him. This multi-functional tool is made of ABS plastic and is bright yellow in color. There are 4 different sides with adjustable screw tighteners so you can make almost any angle. Two sides are longer with measurements in both metric and inches. The longer sections are 10"/25 cms long and the 2 shorter are 5"/12 cms long. The markings are black so they are easy to see on the bright yellow. You can twist and change shapes and make just the pattern you need. Draw your pencil markings with the enclosed carpenter's pencil. There is a package of post its and flag markers for extra convenience. Use for tile, wood, metal and more. Makes a nice gift for that carpenter or builder in your life.