Quantum Storage HD30-3DR Three 30" Skates, One with Drift Resister & Wing Kit

Quantum storage hd30-3dr three 30" skates, one with drift resister & wing kit this kit includes three 30" skates for use with all 18" deep shelf units. simply bolt to bottom of shelf posts and place on v-tracks. one skate includes an adjustable drift resister to slow down and minimize drifting of shelving for uneven floors. wing (joining) kit includes four 1/4" thick plates & hardware. this kit allows the joining of two wire shelf units side by side, sharing one track.