DESCRIPTION This new easily changeable hex mount set allows you to mount a set of rollers in a higher position or install two sets of FRP plates, to assist in preventing your machine from unexpectedly leaving the course. Brass plated Hex mount (Comes in 10mm and 15mm sizes) x 2pcs. 2mm Spring washer x 9pcs. 2mm Washer x 3pcs. 2x10mm Screw x 2pcs. 2x6mm Screw x 4pcs. 4x3mm Aluminum collar x 2pcs. Spanner x 1pc. Can be used with any Mini 4WD cars.