Big Horn 18920 # 9 Complete Countersink with Taper. W. L. Fuller # C9M. Both the Countersink bits & the collars have hex nuts for easy adjusting tightening & accurate positioning. Four flute countersink bodies leave a clean, sharp hole and the adjustable stop collar allows you to either set the screw head flush with the surface.

Features:

• Cutting Diameter: 3/8-Inch
• Drill Hole Size: 3/16-Inch
• High Quality
• Manufactured by W. L. Fuller, Inc.
• Made in USA