The bosch 13mm keyless chuck is a replacement drill chuck designed for fast, tool-free bit changes on compatible corded drills. Fitted with a 1 2 20 unf mount, it accepts drill bits from 2.0Mm up to 13.0Mm in diameter, covering the full range of cylindrical and hex shank bits used across general drilling applications. The single-sleeve keyless design allows for quick one-handed tightening and release, removing the need for a chuck key. This makes it well suited to busy on-site use where speed and efficiency matter ideal for carpenters, electricians, plumbers, and general contractors who need reliable, repeatable bit changes throughout the working day. Compatible with most common drills featuring a spindle lock, this chuck offers a practical upgrade or direct replacement on suitable machines. It is available in both 1 2 20 and 3 8 24 mount configurations, so it's worth confirming your drill's spindle thread before ordering. For specific information on impact resistance or suitability for anti-clockwise rotation, refer to the technical details. Features and benefits: keyless single-sleeve design for fast, one-handed bit changes without a chuck key accepts cylindrical and hex shank drill bits from 2.0Mm to 13.0Mm 1 2 20 unf mount compatible with most common drills with spindle lock suitable as an upgrade or direct replacement on compatible machines specifications: chuck type: keyless chuck chuck capacity: 2.0 13.0Mm mount: 1 2 20 unf net weight: 0.255Kg