Combination Wrench Set (12 pcs) Metric N-PowerFit Drive- Increased strength and reduces rounding or fastener damage by distributing stress through a gentle arc in the bore by enlarging the contact surface. . Designed for maximum strength with minimal wall thickness made possible by tough materials, advanced processing technology, and optimal heat treatment.. Smaller Spanner- Provides better access without loss of strength. Set includes: Combination wrench MS2-055, 07, 08, 10, 12, 13, 14, 15, 17, 19, 21, 22 Resin Molded Tray W445×D185×H52. Exceptional surface finish- Proprietary hard chrome plating for anti-wear, anti-corrosion, and superior appearance. TMS212