The Pneumatic Package is a simple add-on to the GlideStop. Installation is quick and easy, complete instructions and hardware kit are provided and no holes need to be drilled or tapped.The operator simply presses a foot pedal to disengage the contact arm. The operator then pushes GlideStop with the work piece until the index stop has been passed, then releases the foot pedal so that the contact arm will engage with the next index stop.This is an excellent accessory for: Spaced dadoes, Spaced holes, and Boring machines and any time repeat processes are done on a single length of material.Please note that the GS-113 Pneumatic Package is a "add-on" accessory and it is engineered specifically for the GlideStop. as such, it will not work on other stop systems or fence rails.