The “KRE” Cam Lok Wrench or Cam Wrench is designed to remove the pressure on your wrist and elbow to delay or avoid the on-set of tennis elbow (lateral epicondylitis). This is caused by the repetitive motion of tightening (adding pressure) of the cam lok devices and golfers elbow (medial epicondylitis), which is caused by the release of pressure (un-tightening) of the cam lok devices.