The Iron Martin Arm attaches to your O/R table eliminating the need for an extra person in the sterile field. The single lock down mechanism allows adjustment to any height and angle securing all three joints to ensure the attached retractor is held steadier than the human hand. The latest engineering allows for quick adjustment and locking. This system is the cost-effective answer to the more expensive table fixed retractor systems. The Iron Martin Arm is also available in an XL version for bariatric cases and a Dual Arm. Works great with the Nathanson Hook.