It is a Adjustable Tool/multi-function tool/Angle Positioner/Angle cutting tool. Material: ABS Engineering Plastic. Angle Cutting Types: 22.5/ 45/ 90/ 135 Degree. Application: Mainly Used For Mitering And Cutting In Different Angles And Jointing Of Wood And Parget. Easy To Use And Fit For Both Amateur Diy And Professional Manufacture!