This Teng Tools set consists of 8 double ended open spanners, each with a different sized head at each end. The spanners are in metric sizes and comprise the following 6mm x 7mm. 8mm x 9mm. 10mm x 11mm. 12mm x 13mm. 14mm x 15mm. 16mm x 17mm. 18mm x 19mm. 20mm x 22mm. The spanners are made from chrome vanadium steel for strength and durability, and have polished heads and a satin finish. They are manufactured to DIN 3110 standards. Supplied in a handy, moulded storage tray. Dimensions 265 x 142 x 50mm.