Drill Chuck 4-Way Multi-Tool Key for Impact Drivers is the perfect tool for unlocking and locking a of drill chucks to hold bits in place The key tool is made of high-hardness torsion bar, which can withstand greater resistance, stronger force, strong and durable, and is an perfect electric drill accessory. The surface of the drill chuck key is black-plated, deeply anti-rust, dense and wear-resistant The center square feature of the drill press chuck key is perfect for opening acetylene tanks The central mechanical drilling machine has four sizes to choose from, A: 5.5-14MM, B: 6-13MM, C: 6.2-17.3MM, D: 6.2-16MM, only one chuck key can open a of electric drill locks . Material: 45 tool steel Color: Black Package Contents: 8 x Multifunctional flashlight drill key Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.