COMPLETE METRIC SELECTION – Includes verify exact included metric sizes to cover common automotive, machinery, maintenance and workshop fasteners. Included sizes: 8, 10, 12, 13, 14, 15, 17 & 19mm 180° FLEXIBLE HEADS – Pivoting ratchet ring ends adjust around obstructions and improve access to recessed fasteners. CHROME VANADIUM STEEL – Manufactured for strength and durability with a fully polished finish that is easy to wipe clean. COMBINATION DESIGN – Each spanner pairs an open end with a ratcheting ring for positioning, loosening and repetitive fastening. The ratchet spanner set has 72 teeth and a 12 point bi hex drive