60 Degree Countersink – High Speed – 1/4″

60° High Speed Steel Countersink – Precision Gunsmith Tool

This 60‑degree high speed steel Countersink is an essential tool for any serious pistol smith or 1911 builder. Not only does it allow you to countersink small pin holes properly, but it also ensures a clean, professional, flush fit, clearly distinguishing expert work from amateur builds.

Proper countersinking is crucial, particularly in key areas of the 1911 such as the sear pin hole and the mainspring housing cap pin. If these holes are not cut correctly, pins can sit proud of the frame, leading to both cosmetic flaws and potential functional issues. Therefore, this precision countersink solves that problem consistently and efficiently.

Moreover, the 6‑flute cutting design provides a smooth, chatter‑free cut. As a result, edges remain clean and even, without tearing or rough surfaces. Additionally, this design makes depth control easier, allowing you to achieve a uniform finish every time. Meanwhile, the 60‑degree angle matches the correct geometry for firearm pin heads, producing a true flush fit rather than a crude chamfer.

Furthermore, this countersink is made from high speed steel, offering excellent durability and long-lasting edge retention. It cuts cleanly through carbon steel, stainless steel, and common firearm alloys used in 1911 frames. Because of its quality HSS construction, the tool retains sharpness even after repeated professional use.

Also, the compact size and 3/16″ round shank provide excellent control, whether used by hand or in a drill press. In addition, the short overall length improves stability, preventing wandering and reducing the risk of over-cutting during precision work.

Whether you are building a custom 1911, correcting factory pin fitment, or refining a high-end competition pistol, this countersink belongs in your toolbox. In other words, clean pin seating is one of the first details experienced builders notice—and this tool helps you achieve it perfectly.

Countersink Features & Specifications

• 60‑degree countersink angle

• High Speed Steel (HSS) construction

• 6‑flute design for smooth, chatter‑free cutting

• Ideal for 1911 sear pin and mainspring housing cap pin

• Produces clean, flush pin fit

• Shank diameter: 1/4″

• Reamer diameter: 1/4″

• Shank type: Round

• Overall length: 1‑1/2″

• Finish: Bright (uncoated)

Overall, this is a must-have precision tool for professional 1911 gunsmithing and high-end custom pistol work.