National Hardware's 1/4" & 3/8" Rope Clamp Kit is designed to clamp down on two pieces of rope to keep them from sliding. Steel body construction provides maximum durability. Install using pliers or vice for a secure rope loop. Rope Clamps are used to fasten two ropes together or form a loop on a single rope. Simply lay rope clamp on flat surface, place rope side by side in clamp with prongs facing up, hammer four prongs over both ends of rope National Hardware's Lifespan Limited Lifetime Warranty.