Includes 8 open end wrenches for working on electrical installations - Metric sizes. All insulated tools meet the requirements of ASTM F1505. one 98 00 24 8-1/4 in. Open End Wrench-1,000-Volt Insulated 24 mm, one 98 00 22 7-1/2 in. Open End Wrench-1,000-Volt Insulated 22 mm, one 98 00 19 6-1/2 in. Open End Wrench-1,000-Volt Insulated 19 mm, one 98 00 17/6 in. Open End Wrench-1,000-Volt Insulated 17 mm, one 98 00 145-1/4 in. Open End Wrench-1,000-Volt Insulated 14 mm, one 98 00 135-1/4 in. Open End Wrench-1,000-Volt Insulated 13 mm, one 98 00 10 4-1/4 in. Open End Wrench-1,000-Volt Insulated 10 mm, one 98 00 08 4-1/4 in. Open End Wrench-1,000-Volt Insulated 8 mm.