Fastener

A fastener comprising:

• an elongate band having a first end region and a second end region, the band having an inwardly facing surface and an outwardly facing surface extending between the first and second end regions, the inwardly facing surface and outwardly facing surface defining respective pluralities of teeth thereon, such teeth being located at least in the vicinities of the first and second end regions of the band;
• and
• a holding member for holding the band in a closed loop, in which a first end of the holding member provides a first opening for receiving the first end of the band;
• and a second end of the holding member provides a second opening for receiving the second end of the band, and in which the first and second openings are in communication with a chamber for receiving the first and second ends of the band, and in which the holding member comprises an inner surface configured to be directed towards the inside of the loop when formed and an outer surface opposed to the inner face, and in which the outer surface provides at least one access opening providing access to the chamber, and in which the holding member further comprises at least one locking mechanism arranged to be received within and moveable through the at least one access opening, and in which each locking mechanism is moveable between an engaged position in which each locking mechanism is arranged such that at least some of the teeth on the inwardly facing surface engage with at least some of the teeth on the outwardly facing surface of the band, and a disengaged position in which the teeth on the inwardly facing surface are disengaged from the teeth on the outwardly facing surface of the band.