The Mud Dobber mortar box includes heavy-duty locking casters for movement around a jobsite. The 10 gauge heavy-duty steel box is designed for a 10 cubic foot capacity. The box tapers 18 In. down from an inside measurement of 45 In. x 22 In. at the top to 36.5 In. x 22 In. at the bottom for easy reaching and less waste. Four 8 In. heavy-duty casters allow for movement around a job site. Two casters are permanently straight, the other two swivel with a locking feature for ease in steering. It can also be moved with a forklift. The boxs joints are lapped with continuous welds for additional strength. A reinforced 1 In. handle stands up to bumps around the jobsite. A 3-1/2 In. clearance on the bottom of the box provides adequate space for movement with forklifts. Must ship via truck. Proudly made in the USA. Kraft Tool Co. has been an American manufacturer of quality hand tools for the concrete, masonry, asphalt, plaster, drywall, tile, floor covering, and leveling trades for over 35 years.