Sealey MS051 Motorcycle Stud Installation Tool Aids fast installation of threaded studs without risk of damage to thread. Ideal for engine and exhaust studs. Operate using a 19mm spanner and a 5.5mm hex key. Aids fast installation of threaded studs without risk of damage to thread Ideal for engine and exhaust studs Operate using a 19mm spanner and a 5 5mm hex key Thread Sizes: M6 x 1, M8 x 1 25, M10 x 1 25mm Model No MS051