Abstract: There is described a drill bit comprising: a body portion comprising at least one chamber, the drill bit further comprising at least one cutting element, the at least one cutting element comprising a cutting edge and a retention member; wherein the retention member is removably held within the chamber to retain the cutting edge at a first surface of the body portion; wherein the retention member comprises a material with a higher coefficient of thermal expansion than the material of the body portion. There is also described a kit of parts for a drill bit and a cutting element for use in a drill bit or kit of parts.