Safety pins for holding ring handle instrumentsAE-BF491R, BUNT SAFETY CLAMP for holding ring handle instruments 105 mm, 4 1/8″ AE-BF493R, MAYO SAFETY CLAMP for holding ring handle instruments 140 mm, 5 1/2″ AE-BF494R, MAYO SAFETY CLAMP for holding ring handle instruments 125 mm, 5″