Bosch GFA 12-E Professional FlexiClick Off-Centra Angle Attachment. Its lockable 1/4in universal bit holder locks all conventional drill bits and screwdriver bits. Easy to operate. It can be locked in 16 different positions (360°) without having to remove from the cordless screwdriver. A 'One-Click' interface ensures a tight fix to the machine at a glance. High flexibility, with a width across corners of only 12mm the GFA 12-E offset angle adapter enables you to work close to edges and walls. Compatible with GSR 12V-15 FC. Specifications: Corner Dimensions: 12mm. Weight: 0.3kg.