The Drone Enigma SCS is in its 2nd generation now and has a wide variety of features that make it a great SCS. First and foremost, the Enigma SCS is made of 7075 series aluminum, which is 30% lighter and stronger than it's 6 series aluminum counterparts. The Enigma II SCS comes standard with a shim, which allows it to work with both standard (shim in) and oversized (shim out) Pro Scooter Bars. You probably already knew but, just in case you didn't, we'll tell you that SCS is simply the most effective compression system that you can buy. With independent compression of the bar and forks, SCS compression simply keeps your scooter more dialed in than any other type of compression. Available in 4 hot color ways, the Enigma II SCS is a hot buy! The Drone SCS is a SCS compression system. The Drone SCS clamp is a full size SCS because it is slightly larger than a baby SCS but provides maximum clamping power. The Drone SCS only works with SCS bars without a slit. While SCS compression is more expensive than other compression systems, it is the most effective compression system you can put on a pro scooter. The Drone SCS clamp includes a shim and works with both oversized and standard outer diameter pro scooter bars without a slit. The Drone Enigma SCS includes standard M6 bolts, which provide adequate clamping power but can strip if overtightened. It is a good practice with any compression bolt to tighten each bolt 1/2 turn at a time, one bolt at a time, until all bolts are completely tight. The Drone SCS works with the SCS compression ONLY.Weight: 8 ounces Total height: 3.11" Allen bolt size: 6mm Standard and Oversized Available colors: BLACK, NEOCHROME, POLISHED, WHITE