PERFECT FOR HARD-TO-REACH PLACES: This double-ended box spanner set is perfect for accessing hard-to-reach places such as deeply set nuts or spark plugs. TOMMY BAR INCLUDED: The 3-piece set comes with a tommy bar and is the perfect addition to any tool kit. DURABLE: The monoblock spanners are made from carbon steel with a satin finish for durability. SIZES: 18cm in length, the spanners come in 6 sizes between 8mm-13mm.