The Bosch S3 Chuck Key is a replacement chuck key designed to restore full functionality to keyed drill chucks when the original key has been lost or damaged. Selecting the correct key type is essential for a proper fit. This model is Type C, so it is important to verify your chuck's required key type before ordering — Bosch replacement keys are available in types A, B, C, D, F, and G to suit a range of keyed chucks. With a compact overall length of 110mm and a key diameter of 6mm, this chuck
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