DIY Planter dolly! I designed this because the mobile plant carriers that were available were not made for use outdoors. The casters were designed for office furniture and they became unusable quickly. This is a simple approach the provide mobility for heavy planters on a surface that may not be level. The casters i used work well on my paver patio and they have been outside in the element for 3 years now and are as good as new. The materials are called out, the parts are dimensionally described, and the hardware is suggested. Simple build that will cost you a little more than the office wheeled trivet that they still sell and it will last.