The Bosch Chuck Key S3 is a replacement chuck key designed to fit keyed drill chucks, ensuring you can maintain a secure grip on drill bits and accessories during use. Choosing the correct key type is essential for compatibility — this is a Type A key with a reference type of S3. Bosch produces replacement keys across multiple types (A, B, C, D, F, and G), so confirming the correct type for your chuck before ordering is important. This key is suited to contractors, joiners, and tradespeople who need a reliable like-for-like replacement for a worn or lost chuck key, keeping their drill operational without unnecessary downtime. Features and Benefits: • Type A replacement chuck key compatible with keyed chucks • Compact and lightweight at 83g for easy storage in a toolbox or kit bag • Part of Bosch’s range of chuck key types (A–G) for broad chuck compatibility Specifications: Key length (L2): 50mm Outer length (L1): 110mm Key width (SW): 4mm Key diameter (Z): 8mm Replacement key type: A Reference type: S3 Net weight: 0.083kg