The heavy-duty commercial push broom heads come in a 1 inch thick hardwood block with 2 holes for threaded handle reversal which  includes a brace for added strength ??? The Beast???. The block has rounded corners on block for dent prevention and longevity. It also features the fullest fill possible with no crimped fibers used to artificially thicken block. The broom heads come with bristles that have split ends to decrease stiffness and add dust retention.