The EGO replacement chain saw bar is the only replacement bar recommended for use with the EGO Power Head Pole Saw attachment. The replacement bar is manufactured by Oregon (164MLEA041), and is a component of Oregon's Micro-Lite Narrow-Kerf cutting system. It is recommended that the bar should be replaced after the second chain replacement. The EGO 10" replacement saw chain is the only replacement chain recommended for use with the EGO Power Head System Pole Saw Attachment PSA1000. The replacement chain is manufactured by Oregon (90PX056E) and is a component of Oregon's Micro-Lite Narrow-Kerf cutting system. The low-kickback design enhances user safety.