Chema has yet another signature Proto scooter part - the Proto Chema Cardenas Relic SCS. The Relic SCS is influenced by Chema's Mayan roots in Guadalajara, Mexico. Proto is back in the game with the 2nd generation of its 4 inch full knucle SCS. If you ride SCS and need maximum clamping power, the Proto SCS is the SCS clamp for you. With its ageless design, we're not sure why it ever left the Proto lineup. The new SCS features M8 bolts for max clamping power and includes a shim for oversized or standard bars. With a full 2 inches of clamping power for both your bars and forks, the Proto Full Knuckle SCS is the strongest SCS compression system on the market, hands down.Proto Relic SCS is a pro scooter clamp that Proto created for Chema Cardenas, who rides pro scooters for Proto. The Proto SCS is a SCS compression system. The Proto Relic SCS is a full size SCS because it is slightly larger than a baby SCS but provides maximum clamping power. The Proto 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 Proto Relic SCS includes a shim and works with both oversized and standard outer diameter PRO SCOOTER BARS without a slit. The Chema Cardenas signature SCS includes M8 bolts for maximum clamping power. M8 bolts are much less likely to strip than M6 bolts. 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 Proto SCS works with the SCS compression ONLY.