Features Multifunctional: 4 in 1 Drill chuck wrench for most of electric drill clamping tool, ideal to tighten and loosen a chuck. Allows for quick changing of your drill bit heads Universal Function: The chuck key Helps with securing drill bits in hammer drills and is also universal for many other types of drills. This 4 way universal chuck can perfect replacement for lost or damaged chuck keys ,Black plating on the surface of drill chuck key, deep anti-rust, compact and wear-resistant Easy to Carry: Light weight and it is convenient to use.Square hole design is easy to carry with a stip or a quick hook Easy to Use: The drill bit clamping key is comfortable to hold, and the chuck can be tightened and loosened. It is convenient for you to replace the drill bit and helps to reduce stress damage within a certain limit. Specification: Material: 45# Steel Weight: Approx. 52g / 1.8oz Size: Approx. 74 * 38mm / 2.9 * 1.5in Outer Length: Approx. 13mm / 0.5in Inter Length: Approx. 7.4mm / 0.3in   Package List: 1 * 4 in 1 Drills Chuck Key Package List