The ProMark BS bass drum sticks are made entirely of American Rock maple and feature a smooth contour, which fits well in the hand of the player.It comes in two variants,the BS12 has a slightly larger head than the BS10 and provides the most articulate response. The AT Marching Series of Tenor and Bass beaters features several aluminum-handle and hickory-handle sticks/mallets for beginners up through professionals. 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.