The full range of spanners are made from ultra-durable chrome-vanadium steel. 
Meet and exceed both DIN and ANSI standards

Drop forged heat treated

Chrome plated
Assembled from two brands individual spanner:
1. Metric size from Toolux German DIN Standard Cr-V Hi-Torq Thin Wall Combination Ring Open End Spanner

17pc Metric: - 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm, 24mm
2. Imperial size 12pc with BLACK&DECKER brand, and 7/8" with Kincrome brand.

13pc SAE: - 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"