The sturdy design of the ABACO One Stop Single Sided A-Frame prevents tipping.The Abaco Single Sided A-Frame's Rubber strips are mounted on the bottom and back supports to prevent slippage. The Abaco Single Sided A-Frame comes with two ratchet securing bars to hold the slabs in place. The Abaco Single Sided A-Frame has quick release mounting pins change the A-Frame from mobile to stationary using the four (4) provided casters. The Abaco Single Sided A-Frames removable casters allow for easy transport around the warehouse or work site. Space is provided on all base sides for forklift transport. The Abaco Single Sided A-Frame's collapsible design saves on freight costs, yet can be easily assembled.