The Klein Tools Bell System Type Wrench is similar to a standard lineman's wrench, but it's designed for telecom and datacom work applications. Its openings are sized to NEMA hardware specifications. It's also forged and heat-treated for long life. The Klein Tools Bell System Type Wrench is similar to a standard lineman's wrench, but it's designed for telecom and datacom work applications. Its openings are sized to NEMA hardware specifications. It's also forged and heat-treated for long life. Similar to standard lineman's wrench, but with end openings sized to NEMA hardware specifications Silver painted finish Large end has 1-1/16-Inch and 1-3/16-Inch openings Small end has 11/16-Inch and 7/8-Inch openings The Klein Tools Bell System Type Wrench is similar to a standard lineman's wrench, but it's designed for telecom and datacom work applications. Its openings are sized to NEMA hardware specifications. It's also forged and heat-treated for long life.