5" x 2" Total Lock Caster Set of 4 - 2 Total Locking Swivel & 2 Rigid with Red Polyurethane on Steel Wheel - 4,000 lbs Capacity Per Set of 4 This listing is for a Set of 4 with 2 Total Locking Casters and 2 Rigid Casters; 5 inch diameter by a 2 inch tread width heavy duty caster with a high quality, heavy duty, total locking dual pedal metal brake combined with a Red Polyurethane on a Silver Cast Iron Core Wheel. The brake is located on the trailing end of the caster meaning when you are pushing your cart, equipment, or cargo the brakes will be easily accessible for you right in front of your feet to allow you to quickly lock down the casters while you are pushing your cargo, equipment, or cart. There is no need to turn or maneuver the casters to access the brakes like you normally would with a standard top locking brake, these brakes allow you to always have them right in front of you for a quick and painless locking action anytime you need to stop the cart and keep it completely stationary. Total lock brakes are great for outdoor use or anywhere there is a slight incline where a standard locking brake is inferior. Total Locking brakes are also a great option for anyone using a work table, work bench, welding table, or mobile work station that needs to be mobile when you need to move it around but also needs to be completely stationary when you are working. These will prevent even the slightest movement once the brakes are engaged. Features Total Locking Brake Brake Located in Trailing Position Locks Swivel & Wheel Simultaneously Dual Metal Pedal Brakes Double Ball Swivel Raceway Grease / Zerk Fitting in Raceway & Wheel Bright Zinc Finish NSF Listed and Approved Heavy Duty Total Locking Caster Red Polyurethane on Steel Wheel 1,200 lbs Capacity per Caster