RIDGID Like New - RIDGID THRUCOOL 7-1/4 in. Worm Drive Corded Circular Saw The RIDGID THRUCOOL 7-1/4 in. Worm Drive Saw has upgraded to a THRUCOOL motor to optimize performance. THRUCOOL motor technology allows air to flow through the center of the motor and out the sides for more efficient cooling. This saw uses top of the... $139.99 Was: $169.00 Was: Add to Cart