Even though one is included in your basic True Trac System, having more than one may become very convenient if you use multiple saws. Uniquely designed to accept any type of circular saw: Right or Left cut, worm drive, direct drive, corded or cordless. The adapter plate also creates a zero clearance cutting path by utilizing an anti-chip carrier attachment that compliments the anti-chip strips found on the guide rails for splinter free cuts. Kit includes adapter plate only this replacement.