Compare the specs of the Hammer Blue Hammer and Hammer Black Widow Urethane 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.
Click here to add or remove balls from this comparison.
 |  | |
| Brand | Hammer | Hammer |
| Ball Name | Blue Hammer | Black Widow Urethane |
| Cover Name | Performance Urethane | Urethane |
| Cover Type | Urethane | Urethane Solid |
| Box Finish | 800 / 1000 / 2000 / 4000 Abralon | 360 / 500 / 500 Abralon |
| Color | Blue | Black |
| Core Name | NA | Gas Mask |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.57 | 2.50 |
| Total Diff. | 0.032 | 0.058 |
| Int. Diff. | 0.000 | 0.016 |
Torque Length Back End Total Hook Ball Tester Ratings | Already a premium member? Click here to log in. | |