Wimberley AK-100 Sidekick Safety Plate For use with Wimberley Sidekicks produced before May 2018. The AK-100 is not necessary for the current version of the SK-100 Due to concerns about the security of limited clamping force of lever style clamps, the AK-100 is highly recommend when using a Sidekick Includes bottom stop-screw to insure that the Sidekick cannot slide out of your ball heads quick release when loosened Attaches to base of Sidekick using existing mounting holes, Anodized 6061 Aluminum, stainless steel fasteners Machined dovetail that better conforms to limited clamping range of lever-style clamps, providing for better clamping pressure