The set includes the very latest special socket and protective sleeve for PSG plugs (Pressure Sensor Glow-plug). A set of 3 split sockets for glow plugs where the wires are best left connected as with some Alfa Romeo/Fiat and GM engines.A M10 deep socket also equipped with a snap ring to ensure glow plugs do not accidently fall out of the socket making fitting and removal of the plugs much easier. 5 PSG plastic anti-static protection caps and one 12mm single Hex deep 3/8 drive socket with snap ring for a secure fit.8mm,9mm and 10mm deep sockets equipped with 3/8D and U/Js. (72mm long) plus 8mm, 9mm and 10mm deep sockets equipped with ‚1/4D with U/Js (60mm long)Applications include: Audi, Seat, Skoda, Volkswagen, Mercedes-Benz, Smart, VAG, Fiat, and Vauxhall/Opel Manufactured from Chrome Vanadium