We provide a wide range of products to satisfy all houseware and supplies. We are dedicated to give everyone the very best houseware supplies for all home needs, with a focus on dependability, our client satisfaction and great quality. We provide high quality modern products to be enjoyed by many clients. Our aim is continuous improvement and user satisfaction through effective implementation and quality of our products. Features. The quick change 7/16 hex mandrel for a 1/2 drill, and is used for hole saw sizes 1 1/4 to 7 7/8. All mandrels come complete with a highspeed 1/4 pilot drill and are fully heat treated to provide positive drive to the hole saw. Worn pilot drills are easily replaced. Rubber o-ring secures hole saw to mandrel For a tighter fit and no vibration. Go green and recycle this product. An exchangeable product and member of the green exchange system Specifications. Product Material Steel. Tool Power Drill, Drill Press. Description Quick Change Mandrel. Shank 7/16. Weight 0.4 lbs