From the manufacturer
Silverline SP50 Combination Spanner
Open and bi-hexagonal ends with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality fully polished finish. Ultra-strong ballistic nylon storage roll.
Handle – Primary – Finish: Fully Mirror Polished – Chrome plated
Finish :Fully Mirror Polished – Chrome plated
Hardened: Hardened and tempered / 43 – 48HRC