Big Horn 19123 7pc Split Ring - Stop Collar Set. Designed to grip the entire diameter of your drill bit. Used to accurately control the depth of the hole you are drilling. These split collars will hold where you put them every time. Sizes include 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", and 1/2" 7-piece set comes with allen wrench.

• Designed to grip the entire diameter of your drill bit without screw ever touching the shaft
• Used to accurately control the depth of the hole you are drilling
• hold securely in place where you put them
• Sizes fit bits 1/8-Inch, 3/16-Inch, 1/4-Inch, 5/16-Inch, 3/8-Inch, 7/16-Inch, and 1/2-Inch
• Includes allen wrench