Extra storage right next to the press is always a welcome addition and really helps with organization, comfort and economy of motion. The sidebin system is designed for versatility and can be installed directly to your bench-top or installed on any InLine Fabrication Ultramount press riser. (Full height, JR or Micro.) This version fits the RCBS Rockchucker supreme, RCBS Rockchucker 1,2,3. RCBS Turret and Pro2000. The base plate also includes die storage for (3) 7\8ths dies. (Only useable if your press is mounted on an Ultramount to provide the clearance underneath.) This system works perfectly with the Inline Quick change system.