Combination spanners with one open end and one ratchet ring end. -72 teeth ratchet mechanism (5 degree angle heads) -Manufactured form alloy steel with a mirror finished -Use the open end to break nuts and the ratchet end to ratchet the nut off. -SET INCLUDES 1.8mm (total length 150mm) 2.10mm (total length 170mm) 3.12mm (total length 176mm) 4.13mm (total length 193mm) 5.14mm (total length 210mm) 6.17mm (total length 240mm) 7.19mm (total length 265mm) 8.21mm (total length 285mm) 9.22mm (total length 290mm) 10.24mm (total length 305mm) 11.27mm (total length 325mm) 12.30mm (total length 360mm) 13.32mm (total length 385mm) -All contained in a plastic wallet for easy storage and transportation