Compare the specs of the Hammer Black Widow Urethane and Hammer Blue Hammer side by side in the ball comparison table below. To view the full bowling ball review for one of these balls, click the ball name link in the table below.
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| Brand | Hammer | Hammer |
| Ball Name | Black Widow Urethane | Blue Hammer |
| Cover Name | Urethane | Performance Urethane |
| Cover Type | Urethane Solid | Urethane |
| Box Finish | 360 / 500 / 500 Abralon | 800 / 1000 / 2000 / 4000 Abralon |
| Color | Black | Blue |
| Core Name | Gas Mask | NA |
| Core Type | Asymmetrical | Symmetrical |
| RG | 2.50 | 2.57 |
| Total Diff. | 0.058 | 0.032 |
| Int. Diff. | 0.016 | 0.000 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |