For the assembly and disassembly of the lambda probe, the radiator fan thermoswitch, the assembly of diesel injectors, etc. Manufactured made of chrome vanadium steel (CR-V) for greater strength and durability. ; The tools have a light coating of oil to protect them from rust. The oxygen sensor wrench set contains 3/8" and 1" wrenches. /2": 3/8" drive: 7/8" x 90 mm, slot 20 x 74 mm; 7/8" x 90 mm, slot 8 x 63 mm; 1 1/16" (27 mm) x 74 mm; 7/8" (22 mm) x 30 mm, with 46 mm elbow. 1/2" drive: 29 x 90 mm, slot 7 x 67 mm; 27 x 78 mm (12 sides); 7/8" (22mm) x 50mm, with 24mm elbow. 7 Piece Oxygen Sensor Socket Removal Tool Kit. This Socket wrench set for lambda probe injector in a practical system case is suitable for demanding workshop use as well as for private use. Also ideal for tight spaces in the vehicle. Specification: 29 x 90 mm, 1/2' drive, slot 7 x 67 mm 7/8' (22mm) x 90mm, 3/8' drive, slot 20 x 74mm 27 x 78 mm (12 point), drive 1 /2' 7/8' (22mm) x 90mm, 3/8' drive, 8 x 63mm slot 1 1/16' (27mm) x 74mm, 3 drive /8' 7/8' (22mm) x 50mm, with 24mm elbow, 1/2' socket 7/8' (22mm) x 30mm, with 46mm elbow, 3/8' socket