Klein KT223X4-INS Lineman's Insulating 4-in-1 Box WrenchKlein Tools KT223X4 INS Description The Klein Tools Lineman's Insulating 4 in 1 Box Wrench is the only double ended 4 in 1 wrench on the market to meet the ASTM standard 1000V rating. It features a transparent handle that shows the metal ends of the wrench are not touching. The solid, durable wrench features four 12 point socket sizes: 1 2'', 9 16'', 5 8'', and 3 4''. Klein Tools KT223X4 INS Includes (1) Insulating Wrench Klein Tools KT223X4 INS