The Spine is the superior wall anchor

Anyone recovering from shoulder surgery or injury

another muscle takes over the work

This kit is designed to be paired with an Iron Neck Harness

you may wish for more resistance when using Iron Neck

Safe Lock Door Anchor Bundles & Packs The Spine is the superiorTraining at home or in the office is easy with the Safe Lock Door Anchor. Follow these simple instructions to set your Iron Neck or Fitness Bundle up and get your workout started: Setup Open door Slide the door anchor's D ring between the door and frame Close door and make sure the knot is secured Firmly pull on the d ring to ensure a secure hold Note: Do not apply more than 50 lbs. of resistance to any single anchor clip at one time.