A system for positioning and restraining a hand during hand surgery and similar may include a support plate and a plurality of finger restraining elements, wherein each of the finger restraining elements is removably connectable to a finger or a plurality of fingers, and is detachably attachable to the support plate. The support plate may include a magnetic material, and each of the finger re-straining elements may include a rigid ring portion for receiving a finger, and a fastening portion with a permanent magnet for detachably attaching the finger restraining element in a desired position on the support plate, so that a finger received in the ring portion can be secured to the support plate in the desired position.