1Excellent Aluminum Alloy Material: This punch locator is made of excellent aluminum alloy material, which is wear resistant and erosion resistant, and will not rust over time. 2Knob Screws: This punch locator uses knob screws so you can adjust the distance of the punch according to your needs. 3Accurate Positioning: This punching locator has a scale on it, you can accurately locate the position you want to punch, and the control of the distance is very exact. 4Small And Portable: This cabinet punch locator is very small, and takes up little space and is portable for builders, professionals and carpenters. 5Easy To Operate: This perforation positioner is easy to install and requires no experience. By adjusting the middle nut, you can simply adjust the distance between the edges of the cabinet or drawer, as well as the distance between the holes.