The EVANS Pull Cord Drum Key gives you the speed of a power drill with the precision of a drum key. The horizontal key head is connected to a retractable coil spring pull cord system, allowing you to rapidly tighten or loosen the tension rods without the need for a drill. The third, fixed key head is designed for fine tuning. With its sleek, durable housing and a design rated for hundreds of drumhead changes, the EVANS Pull Cord Drum Key is the most efficient way to change or tune your drumheads.