sku=VG70-40,select_size=Galt Skull Trephine with adustable centering point and detachable cross-bar handle 13mm |sku=VG70-41,select_size=Galt Skull Trephine with adustable centering point and detachable cross-bar handle 19mm |sku=VG70-42,select_size=Galt Skull Trephine with adustable centering point and detachable cross-bar handle 25mm 