These Snappy quick-change combination countersinks will drill the hole for the body of the screw, countersink for the head and counter bore for a plug. Use with a Snappy quick-change chuck for fast, keyless operation.

Features:

• Large 1/4" gold socket head screw - the drill bit will not slip.
• 3/8" or 1/2" diameter counterbore.
• Combination countersink and/or counterbore for standard wood plugs.
• Standard hex shank fits all power bit quick change chucks.
• Alloy steel and thru hardened for long life - can be resharpened.
• Drill bits are adjustable for different length screws.
• 82¬∞ countersink angle.
• Drill bits are replaceable with standard round drill bits.