Rod - rod retaining clip for the connection between the two connecting rods fixed.

Needle - retaining clip for pole between the needle and the connecting rod is connected fixed.

Fast bayonet spring design. When assembling the outer Fixed frame temporarily fixed convenient, simple and easy to adjust.

Full three-dimensional rotation can be adjusted.

Adaptation separate needle layout effectively avoid the important blood vessels, nerves, surgery to prevent serious secondary damage.

Universal square head bolts, with special tools, easy to adjust and lock.

Compact and light weight.