Juice Performance Ultra Power Booster Cables feature Hopkins' patent pending Cinch-Lock Technology clamps. Cinch-Lock clamps use a ratcheting mechanism that secures tightly to the battery terminal in an effortless and safe manner eliminating the problem of current clamps accidentally slipping off and getting tangled in a fan belt or damaging your vehicle. The Cinch-Lock clamps are 3 times easier to open and close, 2.5 times more secure, and are up to 25 percentage more powerful than competitors clamps. Juice Performance Power Booster Cables now offer a 100 percentage copper alternative in four of the top selling cables as well as an extreme weather alternative in all five of the Juice Performance Power Booster Cables.