Threaded Stem M10 1.50x25mm Swivel Caster Wheels, 4 Inch Heavy Duty Casters Threaded Stem Casters No Noise Swivel Casters Set Of 4 Locking Castor Wheels For Funiture, Workbench, Carts No Noise Tpr Wheels 600lb Capacity The SCREWS sizes of the four 3 inch stem casters are different: Metric Size M10-1., 50×25mm; Imperial Size 5/16''-18×25mm; American Size 1/2''-13×25mm;NOTICE: Please choose the right size according to your needs! 2 Ste Caster Wheels with Safety Dual Locking 600Lbs Heavy Duty... Complete accessories are included for easy installation. 4 Threaded Stem Casters with 1/2-13 threaded stems The casters will make work more easier and convenient! 100% Warranty & Customer Satisfaction! Heavy Duty Casters -- Threaded stem swivel casters are quality assured, casters of heavy duty, locking casters, safe and labor-saving to use SWIVEL & STABILITY & STURDY -- Large capacity; 360 Degree Rotation; Swivel casters; Side Locking Brakes; Soft TPR, no noise; FLEXIBILITY & SAFETY & STURDY; Side lock mechanism ensures stability! It is unnecessary helper for daily work! Heavy Duty Casters -- Threaded stem swivel casters are quality assured, casters of heavy duty, locking casters, safe and labor-saving to use!