This thin wall PSG glow plug socket set is designed for the disassembly/assembly of common type glow plugs and special PSG glow plugs with pressure sensors. Made from high-quality chrome vanadium steel for durability and strength. Satin chrome finish for corrosion protection. Supplied inside a blow moulded plastic storage case. Set contains: 3x 72mm 3/8" Dr. glow plug sockets with universal joint: 8mm, 9mm, 10mm 3x 60mm 1/4" Dr. glow plug sockets with universal joint: 8mm, 9mm, 10mm 3x Glow plug split sockets: 8mm, 9mm, 10mm 2x 1/4" Dr. sockets: 8mm, 50mm deep 1x PSG glow plug socket with snap ring: 12mm 1x 100mm 1/4" Dr. extension bar 1x 1/4" Dr. universal joint 4x Protection caps .