Ninja Kick Percussion is a USA-based drum accessories company founded by Aaron and Molly Krause. Aaron, a drummer with over two decades of experience spanning pop-punk, jazz, and metal, partnered with Molly — a small business owner with a background in design and marketing — to develop a new approach to bass drum beater technology. The company's products are machined and hand-assembled in the United States.

The brand's flagship product is the NK-9, billed as the world's first spring-assisted bass drum beater. The patented design incorporates a spring mechanism within the beater head that provides faster rebound and allows the drum head to resonate more fully. The NK-9 features a rounded beater face, an included weight for customization, and is compatible with any bass drum pedal. The beater went through eight prototypes over two years of development before reaching its final design, and weighs 78 grams.