The Design Engineering Inc. Locking Tie Tool is designed to tighten stainless steel locking ties that is made of hardened tool steel and black oxide coated for years of trouble-free use, according to the company. To use, technicians can slide the tool on the end of any 1/4” nut driver, engage the tie and twist. The Locking Tie Tool will fit on the end of any standard 1/4” drive extension so working in tight spaces is not a problem, according to the company.