Product Description Along with having an ergonomic handle for comfort, a knurled knob for easy head changes, and a non-slip magnetized head, the Torque Key's handle can be pre-set to release at a specified tension, ensuring even tuning at each lug. From the Manufacturer Evans Torque Key has an ergonomic grip for maximum comfort, a knurled knob for quick spinning, and a slip-resistant magnetic head. The torque handle can be set to a desired tension to help drummers attain more accurate tuning. Evans drum keys are ergonomically designed to fit the needs of drummers in a wide variety of playing and tuning situations. With multiple available designs, Evans drum keys help drummers attain accurate tuning on-the-go, at a gig, or in the studio.For over 40 years, Evans has been a pioneer of drum head manufacturing and design. Known for innovative designs such as EMAD, EC2S, and the Hydraulic series, Evans drum heads are made in the USA in a state of the art manufacturing facility. Acquired in 1996 by D’Addario and Company, the global leader in musical instrument accessories, the Evans brand is synonymous with quality and consistency.