No Compromises - Innovative stepped box-ends deliver excellent access and clearance without sacrificing strength * Versatility - Works with a wide range of sizes and can be easily moved from job to job * Comfort - Smooth profile and unbroken surface allows more torque to be applied comfortably * Able to tackle the following sizes: 5/16, 3/8, 7/16,1/2, 9/16, 5/8, 11/16, 3/4 in