A surgical staple, comprising: a first proximal leg; a second distal leg; and a non-linear base, comprising: a first drive surface; a second drive surface; wherein the first drive surface, and the second drive surface are configured to receive one or more forces to drive the staple into position; and a contour intermediate the first drive surface and the second drive surface, wherein the first drive surface is proximal relative to the second drive surface and wherein the first drive surface is vertically further away from the free ends of the staple legs (164, 166) than the proximal end of the second drive surface when the surgical staple is in a position such that the free ends of the staple legs (164, 166) point upwards; wherein the second drive surface is laterally offset from the first drive surface when seen in a direction from one of the legs (164, 166) towards the other leg (164, 166); and the second drive surface slopes vertically away from the free ends of the staple legs (164, 166) in the distal direction when the surgical staple is in a position such that the free ends of the staple legs (164, 166) point upwards. a first proximal leg; a second distal leg; and a non-linear base, comprising: a first drive surface; a second drive surface; wherein the first drive surface, and the second drive surface are configured to receive one or more forces to drive the staple into position; and a contour intermediate the first drive surface and the second drive surface, wherein the first drive surface is proximal relative to the second drive surface and wherein the first drive surface is vertically further away from the free ends of the staple legs (164, 166) than the proximal end of the second drive surface when the surgical staple is in a position such that the free ends of the staple legs (164, 166) point upwards; wherein the second drive surface is laterally offset from the first drive surface when seen in a direction from one of the legs (164, 166) towards the other leg (164, 166); and the second drive surface slopes vertically away from the free ends of the staple legs (164, 166) in the distal direction when the surgical staple is in a position such that the free ends of the staple legs (164, 166) point upwards. a first drive surface; a second drive surface; wherein the first drive surface, and the second drive surface are configured to receive one or more forces to drive the staple into position; and a contour intermediate the first drive surface and the second drive surface, wherein the first drive surface is proximal relative to the second drive surface and wherein the first drive surface is vertically further away from the free ends of the staple legs (164, 166) than the proximal end of the second drive surface when the surgical staple is in a position such that the free ends of the staple legs (164, 166) point upwards; wherein the second drive surface is laterally offset from the first drive surface when seen in a direction from one of the legs (164, 166) towards the other leg (164, 166); and the second drive surface slopes vertically away from the free ends of the staple legs (164, 166) in the distal direction when the surgical staple is in a position such that the free ends of the staple legs (164, 166) point upwards. wherein the first drive surface, and the second drive surface are configured to receive one or more forces to drive the staple into position; and