A device for inserting implants comprises an elongate, hollow shank with a gripping head at one end to grip and hold an implant. The driven assembly has an inner sleeve and a locking panel fastened to the clutch assembly and selectively engaging the inner sleeve. The mounting piece includes an elongated body and a mounting end bent from the elongated body. The ruler preferably includes an engaging member that has a side opening for receiving a portion of the ruler during measuring of the antler circumference and inside spread. Finally, the circuit is tested using test patterns for each group of faults. The assembly includes a removably mounted cover plate that covers a void defined by a part of the landing gear assembly.