Milwaukee has designed the combination wrenches from the ground up， delivering maximum torque and ultimate user comfort. The MAX BITE open-end grip improves the wrench's grip on nuts and bolts， and the geometry reduces rounding and stripping. The comfortable I-Beam handle design allows superior user comfort even while applying high torque. Milwaukee wrenches feature ink-filled size labels for easy size identification and quick distinction between SAE and metric sets. The 15-piece kit comes in a storage tray designed for long-term storage keeping your tool chest organized. Includes 1 each: 8 mm， 9 mm， 10 mm， 11 mm， 12 mm， 13 mm， 14 mm， 15 mm， 16 mm， 17 mm， 18 mm， 19 mm， 20 mm， 21 mm， 22 mm.