This is the optional Sway Bar Set for the HPI E-10 Touring Cars. Fine tunes handling by adjusting roll stiffness of front and rear suspension Two each 1.2mm, 1.4mm and 1.6mm Sway Bars Four Sway Bar Balls with Set Screws (HPIC3102) 1.5mm Hex Wrench (HPIR1491) 2.0mm Hex Wrench (HPIR1904) Mounting Hardware and instruction sheet Phillips screwdriver (DTXR0172) and needle nose pliers (DTXR0300) jxs 1/29/08 ir/jxs &