Gardner Bender® Heavy-duty zip ties are hard-wearing and designed for rugged industrial, automotive, and farm/ag applications demanding high levels of tensile strength and large bundle diameters. Permanently secured until you cut them off. Gardner Bender® Heavy-Duty cable ties lock tight without stretching or sliding.When you've got a big job that demands a strong tie able to handle a large bundle diameter then count on Gardner Bender® heavy-duty cable ties.