Chicago Pneumatic CP93 Series Chipping Hammers feature a robust design for demanding industrial applications. Choose from .680 round shank or .580 hex shank models. CP93 Series Chipping Hammers are offered with either a compact gooseneck grip, or heavy duty 4 bolt style handle. Stroke lengths vary. A tool with a longer stroke will deliver more powerful blows at a slower rate, while tools with higher blows per minute (BPM) don't hit as hard, but hit faster. Make your choice based on the job at hand.