Premium Chrome Vanadium steel forged with a complete 10-step state of the art heat treatment process, constructed for serious professionals in high torque environment Flawless MaxKrome plating, achieved by thorough polishing and careful application of chrome protective plating, ensures durability and corrosion resistance 12-point WaveDrive box end transfers torque uniformly and prevents damaging and rounding of the bolt, 15-degree offset for knuckle clearance and working in tight spots Constructed longer than most other standard-pattern wrenches, giving you more leverage and access to hard-to-reach areas 19-piece set completes with a heavy-duty canvas pouch, sizes: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 mm This Capri Tools Combination Wrench Set is made for serious professionals in high torque environment. We use premium Chrome Vanadium steel and a complete 10-step state of the art heat treatment process to make these combination wrenches. The result is a set of combination wrenches that does not break under high torque pressure. Each combination wrench underwent careful polishing and protective plating process to achieve its flawless polish. Constructed longer than standard-pattern wrenches, our wrenches give you more leverage and access to hard-to-reach areas. The 12-point box end has our WaveDrive design that transfers torque uniformly and prevents damaging and rounding of the bolt. 15-degree angle offset give you knuckle clearance and also helps you navigate in tight spots. A heavy-duty roll-up canvas pouch is included to carry these combination wrenches. Metric sizes include: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 mm. The Capri Tools Combination Wrench Set meets ASME B107.100 standards.