Professional tool for commercial, or occasional use Metric combination spanners Manufactured from chrome vanadium steel for strength and durability Metric spanners Combination design spanner Combination so open end on one part of the spanner and a ring spanner on the other end The closed end has a 15-degree ring for access into more restricted areas as well as to take your knuckles away from the item to prevent injury BI Hex 12-sided ring spanner for greater leverage and less chance of slipping when using SET INCLUDES THE FOLLOWING SIZES - 6mm / 7mm / 8mm / 9mm / 10mm / 11mm / 12mm / 13mm / 14mm / 15mm / 16mm 17mm / 18mm / 19mm and 22mm 15 spanners ranging from 6mm to 22mm Comes complete in a tool roll for easy storage and transportation