Stevens grip is a technique for playing keyboard percussion instruments with four mallets developed by Leigh Howard Stevens. While marimba performance with two, four, and even six mallets had been done for more than a century, Stevens developed this grip based on the Musser grip, looking to expanded musical possibilities. Stevens codified his grip and his approach to performance techniques developed during his studies at the Eastman School of Music in his 1979 book, Method of Movement for Marimba. In this book, Stevens explains that his grip is an evolution of the Musser grip, and it is sometimes called the Musser-Stevens grip.[1]: 8