Swisher's walk behind caster kit is a great accessory to the walk behind brush mowers. It easily fits all 2005 and newer swisher 24" walk behind brush mowers. The 8 x 3 pneumatic wheels rotate 360 degree to improve stability and ease of use and it removes the mower weight off the operator. Once added to your existing machine, it becomes a fixed 4" cutting height. Constructed of laser cut formed and welded heavy duty steel. Made in the USA.