Center Steer Padded Knee Guard Fits Profile Steel and Alum, and GME Steel and Alum boxes. (may also fit others). Simple to install- 2 hose clamps install around box side tubes. Constructed from .100" Aluminum and TIG welded for strength. Completely padded for safety around the knees. Has clearance for large (2kw) inboard starter. Will clear Winters and Bert shifter linkages.