Apparatus for use in valve repair, comprising a cardiac implant and a delivery tool: the cardiac implant comprising: a tissue-adjusting member configured to be coupled to tissue of a patient; an adjusting mechanism comprising a housing and a rotatable structure that is disposed within the housing and configured to adjust a tension of the tissue-adjusting member by the rotatable structure rotating with respect to the housing; a tissue anchor coupled to the tissue-adjusting member via the housing and configured to screw into the tissue of the patient; the delivery tool reversibly coupleable to the rotatable structure and comprising a handle portion comprising: a first actuating element configured to rotate the tissue anchor so as to facilitate screwing of the tissue anchor into the tissue of the patient while not facilitating rotation of the rotatable structure with respect to the housing; and a second actuating element configured to rotate the rotatable structure with respect to the housing while not facilitating rotation of the tissue anchor, thereby adjusting a tension of the tissue-adjusting member, wherein the first actuating element and the second actuating element are separate rotating members that control separate functions. the cardiac implant comprising: a tissue-adjusting member configured to be coupled to tissue of a patient; an adjusting mechanism comprising a housing and a rotatable structure that is disposed within the housing and configured to adjust a tension of the tissue-adjusting member by the rotatable structure rotating with respect to the housing; a tissue anchor coupled to the tissue-adjusting member via the housing and configured to screw into the tissue of the patient; the delivery tool reversibly coupleable to the rotatable structure and comprising a handle portion comprising: a first actuating element configured to rotate the tissue anchor so as to facilitate screwing of the tissue anchor into the tissue of the patient while not facilitating rotation of the rotatable structure with respect to the housing; and a second actuating element configured to rotate the rotatable structure with respect to the housing while not facilitating rotation of the tissue anchor, thereby adjusting a tension of the tissue-adjusting member, wherein the first actuating element and the second actuating element are separate rotating members that control separate functions. a tissue-adjusting member configured to be coupled to tissue of a patient; an adjusting mechanism comprising a housing and a rotatable structure that is disposed within the housing and configured to adjust a tension of the tissue-adjusting member by the rotatable structure rotating with respect to the housing; a tissue anchor coupled to the tissue-adjusting member via the housing and configured to screw into the tissue of the patient; the delivery tool reversibly coupleable to the rotatable structure and comprising a handle portion comprising: a first actuating element configured to rotate the tissue anchor so as to facilitate screwing of the tissue anchor into the tissue of the patient while not facilitating rotation of the rotatable structure with respect to the housing; and a second actuating element configured to rotate the rotatable structure with respect to the housing while not facilitating rotation of the tissue anchor, thereby adjusting a tension of the tissue-adjusting member, a first actuating element configured to rotate the tissue anchor so as to facilitate screwing of the tissue anchor into the tissue of the patient while not facilitating rotation of the rotatable structure with respect to the housing; and a second actuating element configured to rotate the rotatable structure with respect to the housing while not facilitating rotation of the tissue anchor, thereby adjusting a tension of the tissue-adjusting member, wherein the first actuating element and the second actuating element are separate rotating members that control separate functions.