Features 1、Made of aluminum alloy, anodized surface, durable and not easy to rust. 2、6mm, 8mm and 10mm Cr12 metal drilling bushing, wear resistance. 3、A hand-held puncher is used to punch holes in the board and the edge of the board so that the board can be joined together. 4、Two claws design is convenient for rapid positioning of drilling center, drilling maximum thickness is 46mm. 5、Compact size and light weight, easy to use and carry. Specification Features: Made of aluminum alloy, anodized surface, durable and not easy to rust. 6mm, 8mm and 10mm Cr12 metal drilling bushing, wear resistance. A hand-held puncher is used to punch holes in the board and the edge of the board so that the board can be joined together. Two claws design is convenient for rapid positioning of drilling center, drilling maximum thickness is 46mm. Compact size and light weight, easy to use and carry. Specification: Condition: 100% brand new Drilling maximum thickness: Approx. 46mm / 1.8in Package List: 1 x Hole Locator 4 x Drilling Bushing (6mm, 8mm, 10mm) Package List