Cross Action Retractor; With Ratchet, Angled, model RS-6521 is manufactured by Roboz Surgical Instrument Co., Inc. Cross Action Retractor is a self-retaining retractor that contains claws. If a small or shallow incision needs to be held open, especially in ophthalmology operations, this retractor can be held into place due to the ratchet mechanism that separates the two 4×4 prongs.