Master Chuck II

Opens most chucks on tools by: Skil, Milwaukee, Makita, Ingersoll-Rand, Chicago Pneumatic, Delta, Craftsman, Porter Cable, Black & Decker, Jacobs, Cooper, Craftsman, Rockwell, Ridgid and more! High-quality steel. 3in. x 3in.. 1 year warranty. Drive (in.): 1/4, 3/8, and 1/2, Chuck Key Type: Table, Square Center Hole: Yes, Material Type: Treated Steel With Black Oxide Finish, Overall Dimensions L x W x H (in.): 3 x 3