Description:Bolt-on rotor hub for use with the rotary cutter drive system on Cat Forestry Mulchers. Cat designs and manufactures the rotor hubs to endure high torque loads. The result is a rotary cutter that lasts longer and works harder over the life of the machine.Attributes:• Material: Steel• Thread Size: M12 (4X)Application:Cat rotor hubs are a support component in Cat rotary cutter assemblies. Consult your owner’s manual or contact your local Cat Dealer for more information.