Devices and methods for reinforcing tissue grafts are described herein. In one embodiment, an implant is described that includes a proximal end portion having a through-hole formed therein, a distal end portion, and a reinforcing insert disposed in the through-hole. The insert includes a proximal face, a distal face opposed to the proximal face, a first upper surface extending between the proximal and distal faces and having a generally convex shape that abuts against at least a portion of a sidewall of the through-hole, and a second lower surface extending between the proximal and distal faces and having a generally concave shape. The second lower surface and portions of the sidewall of the through-hole not abutted by the first upper surface form a reinforced through-hole of the implant.