Self-Aligning Kick Drum Beater for Roland Kick Trigger Pads Designed for use with Roland kick trigger pads, the KDB-100 is a self-aligning kick drum beater that automatically adjusts to hit flush every time for accurate triggering and optimum response. The KDB-100 can be mounted on a traditional kick drum pedal, and features a round hard plastic beater with a flat striking surface. An adjustable rod weight allows you to customize the action and feel. Designed for optimum response with Roland kick trigger pads Self-aligning beater hits flush every time Beater diameter: 1-1/4 inches/3 cm