With the Bosch drill chuck key D S2, you quickly replace a lost or worn key so your drilling work continues without delay. This sturdy metal replacement key is designed for keyed geared drill chucks with a 6 mm pilot hole. Thanks to the 40 mm key length and 110 mm overall length, you easily apply the leverage needed to clamp drill bits firmly in place and prevent slipping during heavy applications. This ensures precise and controlled bit changes every time.