Makes spring installation simple and easy. No more SORE HANDS from pulling springs! Works with all length of springs on all types of trampolines. Easy grip design. Instructions for use: It is best to use a spring tool as an aid to pull and attach the springs from the “V” ring on the trampoline mat to the frame holes. Using your hand can lead to getting “spring pinched” and also doesn’t properly tension the spring. Attach the spring hook down, to the “V” ring on the trampoline mat and using the “spring tool”, pull the attachment spring to the frame by inter-connecting spring hooks and pulling with one hand. When the attachment spring hook reaches the frame, use other hand to push it into the frame hole while disengaging the “spring tool”. Repeat until all springs are installed. Use reverse procedure to remove springs from trampoline.