XLarge Pedestal- The largest heaviest base available for sturdy tying. Recommended for all full size Barracuda models. Base weighs 5 lbs. measuring 5-3/4” x 6”. Pedestal includes 7” shaft. MSRP $ 69.00 Large Pedestal-Recommended for Professional, Supreme, Prince, Aristocrat, Barracuda Junior and the Trekker vises. Base weighs 3-1/2 lbs measuring 4”x5-1/2” and includes a 7” shaft. Please specify threaded shaft for Trekkers. MSRP $ 59.00 Medium Pedestal-Recommended for the Voyager II. The base weighs 4 lb and measures 4”x5-1/2”. The hole fits any 3/8” diameter shaft. MSRP $49.00 Small Pedestal-Recommended for the Kingfisher Squire, The base weighs 2-3/4 lb. The hole is treaded to accommodate shaft specifically for these vises. Upon ordering please specify which vise this is for so that the correct shaft will be included.