The Mac Tools SAE and Metric XL Fixed/Flex Head Ratcheting Wrench Sets, Nos. SRDBL1012PT and SRDBL1212PT, feature a fixed, 12-pt zero-degree offset for straight-on access to remove fasteners and for high torque as well as a 12-pt ring end that is flexible through 180 degrees. The ratcheting side also has a 72-tooth gear design for 5-degree incremental movement. The ring profile is designed to maximize contact surface with the nut for a longer lifetime. Available in two sets: 10-pc SAE XL Fixed/Flex Head Ratcheting Wrench Set (No. SRDBL1012PT) and 12-pc Metric XL Fixed/Flex Head Ratcheting Wrench Set (No. SRDBL1212PT). The SAE set includes sizes 5/16" to 7/8". The metric set includes sizes 8mm to 19mm.