Hammer Special Effect PRE-DRILLED Bowling Ball

This ball ships professionally PRE-DRILLED for your convenience.

We’ve simplified the process so you can hit the lanes faster. Based on the ball weight you choose, we’ll drill it to a standard hand size that fits most bowlers in that weight range:

• X-Small (6lbs): Ages 8 & under
• Small (8–9lbs): Ages 8–11, women’s ring size 8–11
• Medium (10–12lbs): Ages 11–15, adult ring size 10 or under
• Large (13–14lbs): Men’s ring size 10–12 or larger hands
• X-Large (15–16lbs): Men’s ring size 13+ or extra-large hands

Want a different drilling size than standard?
Email us immediately after checkout with your order number and your preferred size.

Looking for elite performance with explosive backend power? The Hammer Special Effect is your next-level weapon for challenging conditions.

As the upgraded evolution of the fan-favorite Hammer Effect, the Special Effect fuses classic core strength with modern cover innovation — giving bowlers a shiny ball that rolls early and finishes strong. The proven Huntsman Core returns, delivering a balanced blend of torque, control, and heavy hook potential that thrives under pressure.

But what really sets this one apart is the HK22 Cohesion Solid Reactive coverstock. With a 1500 Grit + Factory Compound finish, it creates exceptional mid-lane traction and a fierce backend reaction — perfect for medium to heavy oil conditions where sharp movement is essential.

Hammer built the Special Effect for high-performance players who want predictability in the early lane, aggression at the breakpoint, and a statement shot into the pocket. Finished in an electrifying mix of black, blue, purple, and red, this ball looks every bit as serious as it performs.

Specs at a Glance:

• Coverstock: Hammer HK22 Cohesion Solid Reactive

• Core: Hammer Huntsman Asymmetric Core

• RG (15lb): 2.47

• Diff (15lb): .050

• Mass Bias Strength: .017

• Finish: 1500 Grit + Factory Compound

• Flare Potential: 5–6 Inches

• Best For: Medium to heavy oil conditions

• Weights: 12lb–16lb

• Performance Level: Upper Mid to High Performance

The Special Effect is built for bowlers chasing high scores in competitive environments. Add it to your bag, and bring controlled chaos to every frame.