Overview Reviews Product Description ProMark OBD5 marching bass drum beaters feature balanced hickory handles with a weight ring underneath the 2 1/4" felt head. The OBD5 is best suited for 28-30" drums. Product Videos Custom Field Product Reviews Write a Review Write a Review × ProMark ProMark Bass Drum Mallets Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *