The bosch 13mm keyless drill chuck is a replacement chuck designed to make bit changes faster and more convenient on a wide range of corded and cordless drills. With a 1 2 20 unf mount and a clamping capacity of 2 to 13mm, it is compatible with most common drills that do not feature a spindle lock. The two-sleeved keyless design allows for easy, two-handed clamping without the need for a chuck key. This makes it well suited to busy tradespeople and contractors who need to swap between drill bits quickly on site without hunting for a separate tool. It securely fastens both cylindrical and hex shank drill bits. This chuck is one of a range of bosch keyless chucks available in different mount configurations, making it straightforward to find the correct replacement for your drill. Check the technical details to confirm suitability for anti-clockwise rotation or impact drill use before fitting. Features and benefits: keyless two-sleeved design for fast, tool-free bit changes accepts cylindrical and hex shank drill bits 2 13mm clamping range suits the majority of common drill bit sizes 1 2 20 unf mount compatible with most standard drills without spindle lock available in multiple mount configurations to suit different drill models specifications: chuck type: keyless chuck chuck capacity: 2.0 13.0Mm mount: 1 2 20 unf net weight: 0.280Kg