Sealey topchest rollcab combination 13 drawer ball bearing runners blck grey sealey ap2513b the economical way to buy american pro ball bearing quality toolboxes supplied packed one inside the other this combo has all the features of the professional chests except that the castors are 100mm features locks on both the topchest and rollcab with additional steel bars that can be locked into place to keep drawers shut smooth 35mm ball bearing drawer runners provide superior performance