Having already installed these on a previous bike, I know from experience that they are the best I've found for racing in the woods. My other bike is a KTM 250 XC-W with stock KTM bars. I purchased these for a 1999 KX 125 with Pro Taper EVO bars installed (1 1/8). They required only slight bending in my vise to line right up, avoiding cables and brake lines. The hardware is high quality. Bar Mounts have hex head fasteners, and the plastic hand guards mount up to the aluminum with deeply cut phillips head screws that are self tapping. They take a beating without stripping or deforming. Everything you need is in the kit, and the inner bar mounts can be installed two ways to give some flexibility in cable avoidance and bar width (I have bars cut down to about as short as they will go and I was still able to make them fit fine). This is a great product and in the future if I need handguards on a bike, I'm unlikely to try anything else.