Use Snappy SD-3 Flat Bottom Counterbores to drill a pilot/clearance hole and counterbore a flat bottomed hole in one step. The unique geometry of the cutters provide excellent chip clearance and cutting performance, even in hardwoods. Perfect for #10 Pan Head screws. Features: Use to drill a pilot/clearance hole and counterbore a flat bottomed hole in one step Perfect for #10 Pan Head screws, lag screws, lag bolts, washer head screws andmore 3-flute flat bottom counterbore with TiN coated twist drill Made of thru-hardened alloy steel for long cutting life Specifications: Drive Shank:1/4″ Hex Power Bit Shank Drill Size:3/16″ Counterbore Size: 1/2″ Finish: Titanium Nitride Material: Alloy Steel What’s Included: (1) Snappy Flat Bottom Counterbore – SD-3 – 3/16″ x 1/2″ Product Notes: Works with the Snappy RotoStop Rotating Stop Collar For Countersink Drill Bits (#161436, sold separately)

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