CRL QuickBit 3/8" Countersink/Drill Bit offers a fast and efficient drilling operation that eliminates time consuming efforts and labor costs. It creates a 1/8" (3.2 mm) pilot hole for your screw and at the same time forms a 3/8" (9.5 mm) countersink for QuickCaps (Cat. No. QC5050) that are easily pressed into place. QuickCaps include 50 each 3" (76.2 mm) screws and 50 each white hole covers. DS 07/25/2016
Drill, countersink, and drive screws without switching three separate bits in and out of your power tool. With a single hand, flip between drilling countersunk holes and driving screws. The countersinking drill and screwdriver bit are secured with set screws, so you can switch them out for any bits with a 1/4" hex shank.
The countersinking drill has an 82 angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.
For No. 10 Screw
Drill bit size: 1/8"
Countersink Body Diameter: 3/8"
Maximum Hole Drilling Depth: 1"