Transform your existing wood dolly into a handy panel cart by attaching these steel stabilizing arms. 1-5/16" Dia upright arms allow for carrying loads up to 250 Lb. Brackets are press-fit onto the dolly (maximum dolly thickness is 1-1/2") and upright size is 12" L x 37" H (39" overall height). Durable steel construction features a black powder-coated finish for long life. Units are pre-drilled and ready to attach hardware. Sold in pairs.