Evans EQ pad is a highly efficient bass drum muffler that attaches to the bottom of the bass drum shell with Velcro. The hinged pad bounces off the head, allowing sustain, before returning to damp the vibrating head. A smaller pad on the opposite end can be used on smaller drums or for minimal damping. For over 60 years, Evans has been an innovator in drumhead manufacturing and design. As the creator of the first synthetic drumhead and other revolutionary products such as EMAD, Hydraulics, and the UV1 series, Evans drumheads are designed with the intent of solving problems for drummers. Regarded for high quality and consistency all Evans drumheads are made in the USA and feature Level 360 Technology., Attaches to bass drum shell with Velcro, Hinged pad bounces off the head, allowing sustain before returning to dampen the vibrating head, Smaller pad on opposite end that can be used on smaller drums or for minimal damping, All Evans accessories are designed, engineered and manufactured to the most stringent quality controls in the industry