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A chuck require a key to provide the necessary torque to tighten and loosen the jaws. It is easier to hold the grip metal drill chuck key than the 4-way Chuck Key so that you could finish your works quickly easily. It is ideal for the handyman who needs to keep their drill bits securely locked into their drill.m At the same time,it is also great for home improvement needs, do it yourself projects and big construction projects. Great to be used with Hammer Drills when a tight fit is required. Also allows for quick changing of your drill bit heads.