Hammer is very pleased to introduce the new Hammer Aggressive Reaction Technology (HART) core concept to the bowling industry. Developed by our team of design engineers, this radical new concept in bowling ball core design provides maximum performance without the need for exotic layouts and weightholes. It is that simple.

Combining the new HART core concept and Violent Response Reactive coverstock gives the bowler more aggressive hook motion and improved hitting power. This unique core concept delivers aggressive backend reaction by placing the pin at 1:30 with the HART in the track. The No Mercy is very simple to drill. For layout purposes, please use the plastic bag as a template.

You can attack the pins aggressively with the Black Widow bowling ball from Hammer. The High Mass Bias Gas Mask core with flip block and violent reactive coverstock give the ball the extra juice to stay on attack mode. The Black Widow hits hard on the back end, giving the needed speed for the big strike!