DW1810 offers tool-free quick-release collar to prevent hole saws from locking to the mandrel</br>DW1803 and DW1805 offer spring-loaded collar that automatically engages drive pins to prevent hole saws from locking to the mandrel</br>All quick change mandrels feature double set screws with a recessed combination head for quick and easy centering bit changes</br>All quick change mandrels utillize hardened steel construction and have been tested through 15??000+ cycles to deliver jobsite durability</br>DEWALT offers a full range of standard and quick change mandrels for versatility in a wide range of hole saw applications</br>Fits Hole Saws 1-1/4-Inch to 6-Inch</br></br>Product Description</br></br>Hardened steel construction features a double set screws with a recessed combination head for quick and easy centering. Used in applications such as installing pipe?? copper