Opening for use with maximum 2-1/4" thick plate/slab

unlike steel bollards

High-performing friction clutch to prevent overwinding or overtravel

•    Screw type loop tool attachment with easy-to-connect feature

As you can see from the product images

Vestil Surface Mounted Removable Steel Pipe Safety Bollards Bollard Height (In.):48 Opening for use with maximumBollards can be used both indoors and outdoors to protect work areas, racking and personnel. Surface mounted zinc coated steel base plate allows for quick and easy bollard removal. Steel base plate is bolted in place. Guard is easily inserted into base plate then secured in place. A padlock may be added to prevent unauthorized removal (padlock not included) Base plate measures 10 1 4"W x 10 1 2"L x 2"H height and include four (4) pre drilled mounting