Kind of heavy and bulky. But looks interesting. Straight from SOG website:
New Product: SOG Pebble XL
03.31.2016 / By #TakePoint / In Gear, New Products, SOG News
The backyard fun never ends. Once you get your hands on these SOG Pebble XLs, you won’t want to stop throwing. Practice and sharpen your accuracy with the included practice target. When you’re ready for battle, the tactical, hardcased black finish will ensure that your mannequin will never see it being hurled toward their face.
Each one of these weighs roughly three pounds and range in size from three to five inches in diameter. Take them with you wherever you go with the included carrying case. Whether you’re commuting on the subway or searching for the source of the Nile River, these will always be at your side. Not only are these fun to sail through the air, they are practical as well. Protected by SOG’s hardcased black coating, they are extremely scratch resistant. Their balance, aerodynamics, and proportions fit well in the hand and easy to throw.
Don’t forget. Like all SOG products, these are backed by a lifetime warranty. Let us know how many you'd like in the comments with ! Available soon.
Key Selling Features:
• Set of three tactical throwing rocks
• Range in size from 3-5 inches in diameter at around 3 pounds each
• Never rusts
• Comes in a nylon carrying pouch.
• Lifetime Warranty
All I can say is "wow"