HOLKIE Leveling Stem Casters Set of 4 Heavy Duty Retractable Caster Wheels, 1/2" and M12 Stem Size, Total Capacity 4960 Lbs, Adjustable Wheel with Ratchet Handle for Workbench, Machine, Equipment

TWO STEM SIZE AVAILABLE: Our threaded leveling casters come with two sizes of screws, M12-1.75 x 33mm and 1/2" -13 x 1.299". Prioritize compatibility. | EASY TO ADJUST: These retractable casters come with a new handle design which makes height adjustment very easy and simple. | HIGH LOAD CAPACITY: Our set of 4 heavy-duty casters has a load capacity of 4960 lbs/2250 kg for a variety of equipment and workbenches. | FIRM & DURABLE: These retractable casters are made from a variety of materials for great durability and to reduce vibration and shock. | MULTIPLE APPLICATION: Our industrial casters are suitable for both indoor and outdoor use and are perfect for a variety of applications such as worktables, sim racing rig, furniture, shelves, carts, lab equipment and more.