Bosch GFA 12-X Professional FlexiClick Bit Holder Attachment with locking mechanism. Allows you to firmly lock inserted bits so they don't come off unintentionally. A 'One-Click' interface ensures a tight fix to the machine at a glance. It has a compact design, its short construction (159mm with GSR 12V-15 FC) enables precise use. Compatible with GSR 12V-15 FC. Specifications: Bit Holder: 1/4in Hex. Size: 27mm. Weight: 0.1kg.