[Adjustable Clamping]Adjustable clamping range grips boards under 85mm thick for versatile installation. [One Handed Installation]Easily hold the door with one hand while drilling with the other for convenience. [Aluminum Alloy Build]High strength aluminum alloy ensures accurate alignment without tilting. [Easy Measuring]Incorporates a measuring function to check door alignment and marking height effortlessly. [Double Safety Features]Rounded corners and protective foam prevent damage, ensuring a clean installation., Manufacturer: Zerodis