Hammer Bowling Bags. Built Hammer tough, this bag design is top quality and provides performance that you expect. Whether you want to bring the competition to their knees or show a little mercy this bag is the perfect accessory for a Hammerhead.Three ball bag Oversize 5 wheels Lockable, extendable handle 600 denier polyester oxford construction Three large accessory pockets Top shoe pocket stores and protects shoes up to U.S. men's size 15 Adjustable, removable padded shoulder strap Welded steel hardware