These are the SureGrip 17mm Wheel Nuts from AKA. FEATURES: Aluminum construction Hard anodized Knurled rear face to grab the plastic of the wheel and stay put INCLUDES: Four 17mm "SureGrip" Wheel Nuts REQUIRES: Installation on wheel hub SPECS: Hex: 17mm Width: 4.5mm (0.18") cnh 8/27/09 ir/jxs