Hole Size: 5/16" (8mm) 8mm Hex Head (4mm Allen Drive) Stem Length: 10mm Head Diameter: 15mm Black Nylon Splash Shield & Rocker Moulding Retainers Compare with: V.W. # 3C0-853-934, Auveco # 22280, Disco # 10207PK, Disco # 10207B, Clip Lizard # 10930