COSVO presents 10pcs double open end spanner set. The spanner set contains 10 spanners of various sizes each made from premium quality Chrome Vanadium Steel. The tools are broadly been used for fastening purposes by mechanics, plumbers and electricians and also for home and domestic work purposes such as tightening/loosening of nuts. The tools are rust proof and hence are strong and durable. Each spanner has two open jaws at both the ends and the jaws are designed so ergonomically that the open ends of the jaws perfectly fits the faces of the nuts. This helps in reducing the risk of slipping while using the spanner. The spanner set contains 10 spanners of the following sizes : 6 x 7 mm, 8 x 9 mm, 10 x 11 mm, 12 x 13 mm, 14 x 15 mm, 16 x 17 mm , 18 x 19 mm, 20 x 22 mm, 21 x 23 mm, 24 x 27mm,  respectively.