Our hub guard uses 1/2" wrenching ARP 12 point hardware only, which is available in our store but are additional, Our hub guard consists of a bottom plate, a top plate and 5 12 point ARP bolts to secure the top plate to the bottom, these fit all sprockets on the market and pulleys as well. The bottom plate will only come anodized black and the top plate is available in your choice of color option. Our plate were designed as a void was found in the market. Common sprocket lockers use a similar design but require you to over torque your bolts by up to 59 degrees of clockwise rotation and only have 6 points of contact and allow the bolt heads to back off. Our "worst case" scenario is turning 29 degrees and ours utilizes 12 points of contact and its not possible for the bolt heads to back out of the locking plate. Our hub guard also has indicator dots built into the plate to aid with lining your bolts up during install, which furthermore reduces the chance of over torqueing your threads. The sprocket bolt option is for the required length to correctly set these up. Sprocket bolts will be sent to match top plate hardware color choice.