Extremely durable double open-end spanners manufactured from Beryllium Copper This 13 piece spanner set is one of a comprehensive range of Premier Non-Sparking Safety Tools, suitable for daily professional use. These non-sparking spanners are die-forged with a double open end and come supplied in a handy storage pouch. Contains sizes ranging from 5.5mm - 30mm. Features:    One of a comprehensive range of Premier Non-Sparking Safety Tools, suitable for daily professional use Manufactured from Beryllium Copper Die forged Double open-end spanners Supplied in a storage pouch Contains sizes 5.5 x 7, 6 x 7, 8 x 10, 9 x 11, 10 x 12, 12 x 14, 14 x 17, 17 x 19, 19 x 22, 22 x 24, 24 x 27, 27 x 30, 30 x 32mm Specification: Pack Qty: 13 piece