ProMark PSMB1 marching bass drum beaters feature balanced hickory handles with a taper underneath the 1 3/8" felt head. The OBD1 is best suited for 16-18" drums. The Performer Series Bass Drum mallets are a practical choice for any bass line from beginners to competitive drum corps and college players. For over 50 years, ProMark has been one of the world's leading manufacturers of drumsticks, mallets, and percussion accessories. Owned and operated by D'Addario & Co., the Houston, Texas based ProMark produces products used globally by the greatest drummers and percussionists in the world, including Neal Peart, Phil Collins, Simon Phillips, Ringo Starr, and many more. ProMark - Make Your Mark.