A releasable clamp for holding an article or parts thereof, for example a device or a tool, the clamp comprising: a set of jaws, including a first jaw and a second jaw, arrangeable to hold the article therebetween; a set of spacers, including a first spacer, arrangeable to space apart respective jaws of the set of jaws; and a set of retaining members, including a first retaining member, arrangeable to space together respective jaws of the set of jaws; wherein respective jaws of the set of jaws comprise a first region for contacting the article, an optional second region defining a portion of a first part of a coupling member, a third region for contacting a respective spacer of the set of spacers and a fourth region for contacting a respective retaining member of the set of retaining members; wherein the clamp is configurable in: a first configuration, wherein the first jaw and the second jaw are mutually unjoined; and a second configuration, wherein the first spacer is arranged to space apart the first jaw and the second jaw and wherein the first retaining member is arranged to apply a net compressive force on the first spacer via the first jaw and the second jaw, whereby the first jaw and the second jaw are conjoined and thereby hold the article therebetween; and characterised in that the first retaining member comprises a set of cylindrical bore regions, including a first bore region and a second bore region, for contacting correspondingly shaped fourth regions of the respective jaws. a set of jaws, including a first jaw and a second jaw, arrangeable to hold the article therebetween; a set of spacers, including a first spacer, arrangeable to space apart respective jaws of the set of jaws; and a set of retaining members, including a first retaining member, arrangeable to space together respective jaws of the set of jaws; wherein respective jaws of the set of jaws comprise a first region for contacting the article, an optional second region defining a portion of a first part of a coupling member, a third region for contacting a respective spacer of the set of spacers and a fourth region for contacting a respective retaining member of the set of retaining members; wherein the clamp is configurable in: a first configuration, wherein the first jaw and the second jaw are mutually unjoined; and a second configuration, wherein the first spacer is arranged to space apart the first jaw and the second jaw and wherein the first retaining member is arranged to apply a net compressive force on the first spacer via the first jaw and the second jaw, whereby the first jaw and the second jaw are conjoined and thereby hold the article therebetween; and characterised in that the first retaining member comprises a set of cylindrical bore regions, including a first bore region and a second bore region, for contacting correspondingly shaped fourth regions of the respective jaws. a first configuration, wherein the first jaw and the second jaw are mutually unjoined; and a second configuration, wherein the first spacer is arranged to space apart the first jaw and the second jaw and wherein the first retaining member is arranged to apply a net compressive force on the first spacer via the first jaw and the second jaw, whereby the first jaw and the second jaw are conjoined and thereby hold the article therebetween; and characterised in that the first retaining member comprises a set of cylindrical bore regions, including a first bore region and a second bore region, for contacting correspondingly shaped fourth regions of the respective jaws.