A humeral implant trial embodiment comprising liners (100), spacers (500), and protectors (600) is disclosed. The humeral implant to be used can be accurately identified and exchanged intra OP, if necessity is identified during the trial. By using a combination of the liners, spacers and protectors, the bone anchoring or the cancellous part of the bone normally used for fixing humeral implants is not compromised. The result is an efficient and perfectly placed implant on the head of a recessed bone, avoiding the conventional poor placement and subsequent correction of the implant. It avoids injury to the cancellous bone part and of the surrounding tissue and avoids lengthy, time consuming and strenuous surgery.
