The Sub-Compact 6-1/2" Circular Saw Guide Rail Adapter is an ideal accessory for precise and accurate cuts when used with Makita Sub-Compact Circular Saws and Guide Rails (sold separately). The Adapter allows Makita 18V Sub-Compact LXT Circular Saws to be used with Makita 55" and 118" Guide Rails, as well as select competitor rails (all sold separately). Contractors are learning that cutting with a circular saw and compatible guide rail is a more portable option to a table saw for ripping sheet material.