Monobloc Spanner & Tommy Bar Set 4pce Chrome vanadium steel with matt finish for extra grip. Allows easy access to monobloc tap nuts in awkward positions. Double-ended with stepped tommy bar for extra leverage. Extendable by slotting in end-to-end for longer reach. Includes tommy bar and 3 spanners with sizes: 8/9mm, 10/11mm, 12/13mm spanners to fit all monobloc tap nuts.