DEI has developed these locking tie tools to tighten stainless steel locking ties. They will save time and hassle while providing a professional looking result. Simply slide them on the end of a 1/4 in. Nut driver, engage the tie, and twist. This gets the tie nice and secure. These specialty tools work with All popular styles of stainless ties--up to 1/2 in. Wide. They are made from hardened tool steel and black oxide coated for years of trouble-free use.