This britool 10 piece combination wrench set comprises the following sizes 10mm 11mm 12mm 13mm 14mm 15mm 16mm 17mm 18mm and 19mm both the 12 point ogv ring end and the open end of each wrench are angled at 15 from the handle axis for better access the ogv profile maximises the contact surface with the nut for a longer lifetime the wrenches are forged from chrome vanadium steel for strength and durability