Mission Engineering Inc Helix Rack Expression Pedal w/Toe Switch - Black Finish Weight: 4.15 lb. Dimensions: 12" x 6" x 6" The Line 6 Helix Rack and Helix Rack Floor Controller feature an expression toe switch jack that allows you to switch effects on an off directly from the SP1-L6H expression pedal You can now turn your wah, whammy or other effects, on and off without having to take your foot off the pedal The SP1-L6H works with the advanced features of the Helix Rack to provide extensive real time control of your rig Use the pedal to vary multiple parameters simultaneously