THE MOST DURABLE HARD SHELL SHOT I'VE EVER TESTED!
The FiberSport Silver Bullet hard shell shot has been tested at our facility by our throwers for the past year and NONE have broken! Throws have been traditional meet style throws on to either a track type synthetic surface or a hardwood basketball court type surface. In addition, these shots were tested by throwing them up against cinderblock walls and crashing down to a parking lot as well as throwing into a tarp/net system and crashing down to a cement floor. They were banged up, beat up, scraped and cut...but none broke and none had their plug pop out! We were extremely pleased with the results.
 
4kg shots have a 113mm dameter
12lb shots have a 125mm diameter
16lb shots have a 135mm diameter