The Stanley 0-97-552 8-piece FatMax locking hex key set contains the following sized keys: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm and 8mm. Key Features of this Stanley Allen Key Set Extra-long keys give easy access for recessed bolts Lock the keys into 3 positions (90°, 135° and 180°) for flexible working and ultimate access in tight spaces Convenient 'Button Lock' releases the keys for secure and easy changes from moving to locked 'Lock in Place' feature locks the keys down and prevents unwanted movement of the handle when in use - this is an industry first! Ergonomic handle for a better grip and the application of more torque