Countersink Drill Bits 13 Pcs Countersink Drill Bit Set  We are more professional. Great heat resistance and anti-abrasive,High speed steel teeth for fast and clean cuts, boasts advantages of high-performance, rust protection and durable,was built tough for repeat use.  hex shank is 1/4, Works in all Cordless and Corded Power Drills with Standard Chuck.  Wide Application Scenarios Covers most popular Spade Drill sizes on the market.  Professional Quality Fast Cutting Wide Application Scenarios
2025 Upgraded 13-Piece Set - The countersink drill bit set includes 5 x Countersink bits (#4, #6, #8, #10, #12), 6 x Bit holders, 1pc Locking keychain, 1pc Magnetic Extension bit holder, 1pc Allen Wrench, Storage Case.
Fits Standard 1/4-Inch Hex Shank Bits - Universally compatible with all 1/4-inch hex shank power tool drill bits, making it a perfect companion for a wide range of drills, screwdrivers, and other tools. Ideal for professionals and DIY enthusiasts alike.
Versatile & Gift-Worthy - Equipped with a twist-lock carabiner for secure attachment to belts, straps, or key rings, this bit holder is a practical gift for men, handymen, and gadget lovers. Whether for organizing tools or reducing desktop clutter, it’s a thoughtful and stylish choice.
Unique Upgrade Four-Flute Design - Featuring a Four-Flute cutting design, these countersink drill bits eliminate chatter and ensure smooth, precise finishes. Compared to single-blade/dual-edge bits, they offer faster cutting, ideal for larger or deeper countersinks.
Drilling Depth Adjustable - Working length of the pilot drill bit is adjustable for precise depth control; hex wrenches included for changing or tightening the pilot drill bits.