This rip fence fits fine on our circular saw.  The screw for tightening it down comes included.  The only negative thing I could say about this fence is that it does not fit squarely in the notch molded into the saw's case.  It extends just a bit further than the slot.  The case still closes fine.  The extra material that sticks out probably makes it easier to pull it out of the case.  Otherwise.  I would recommend this product