General description The Silverline Fixed Head Ratchet Spanner - 18mm is a hardened and tempered chrome vanadium metric spanner featuring a mirror-polished finish for enhanced durability and aesthetics. It is chrome plated to provide excellent corrosion resistance. Designed with a 5° ratchet action, it allows for efficient use in tight spaces. Technical specifications Size: 18mm Material: Chrome vanadium Finish: Mirror-polished and chrome plated Ratchet action: 5°