About This Excellent Quality - Hakkin drill bit clamping wrench is made of solid high-carbon/chrome vanadium steel and coated with durable plastic, with a smooth and polished surface; Anti-rust, non-slip, wear-resistant, and long service life Exquisite Workmanship - Hakkin Chuck key surface polishing smooth without burr, comfortable grip, rotation and tightening more effortless. Beautiful and practical key wrench, is the perfect clamping adjustment hardware tools 5 Different Sizes - Chuck diameter: 3/4" (20mm) / 5/8" (16mm) / 1/2" (13mm) / 3/8" (10mm) / 1/4" (6mm). Package content : 5 x drill chuck key wrench Functional and Practical - Thumb handle chuck key can be used in hammer or drilling mode. The replacement drill press chuck key is a kind of electric drill clamping tool, perfect to tighten or loosen a chuck, which allows a quick change of your drill bit heads. 6 specifications to meet a variety of drill chuck fastening and loosening needs, can be compatible with most of power tool brands.note: Do not hit the chuck key handle with a hammer or other impact tools Convenient Storage and Ease of Use - The small key allows for easy storage and use. Applicable products: Hand drill, hammer drill. Ideal tool kit for keeping drill bits in place,perfect replacement for lost or damaged chuck keys Overview Brand : Hakkin Material : Carbon Steel & Chrome Vanadium Steel Item Diameter : 2E+1 Millimeters Compatible Devices : Drilling Machine Included Components : Drill Bits