These Faithfull professional, high quality Combination Spanners are forged from chrome vanadium steel, which is hardened, tempered and satin chrome plated for corrosion protection. Manufactured to DIN 3113 standards. The broached jaws and rings ensure a consistent tolerance and a guaranteed accurate fit. Both the jaw and ring end are set at a 15 degree offset for ease of use in awkward positions. Size 17mmFaithfull Tools are made to tradesmens' standards by craftsmen who meet the demanding Faithfull criteria for the design and quality of each individual item. All Faithfull non-electrical tools are guaranteed for a period of FIVE years against faulty materials or workmanship, and any tradesman or regular DIY tool user can be confident that the care and quality control behind every Faithfull product is designed to ensure a long and dependable service. Faithfull tools are ideal for the discerning tool buyer who prefers lower prices than those associated with some well known brands, but who is not prepared to compromise too much, if at all, on product quality and reliability. Satin finish chrome vanadium steel Highly strong, durable & corrosion resistant 12 point ring Both ends are angled at 15° for ease of use in awkward positions Ideal for most engineering & automotive applications