【High-quality material】 Made of aluminum alloy, it has high strength and hardness, the shell is sturdy, and it has strong impact resistance, so it can be used with confidence. 【Multiple sizes】 The hinge drill offers 4 different sizes 5/64'', 7/64'', 9/64'', 11/64'' to meet your different needs. 【Convenient operation】 Using the installation wrench, you can quickly change the drill bit with one hand. Simply remove the screws and install with a new replacement drill bit, quick and easy. 【Intelligent design】 The double-hole design quickly and automatically discharges sawdust from the holes on both sides without clogging the drill bit. This will save your time to remove sawdust. 【Wide Application】The self-centering hinge drill is perfect for furniture, kitchens, wood products, cabinets, doors and windows, etc. It can be used to drill holes in furniture, doors and drawer slides to install furniture accessories.