Hopkins Endurance™ Easy-Pull™ 4 Flat Tester. A finger loop provides advanced ergonomics and makes connecting and disconnecting a breeze. LED lights test each electrical function. Easy-Pull from Hopkins Towing Solutions comes with the 3 year warranty of Endurance. Easy-pull grips ease in connecting/ disconnecting. LEDs test left/right turn, brake and taillight. Ergonomic grip for easier handling.