2 Sets Drill Bit Stop Collar Set Drill Bit Depth Stop Collars Metal Shaft Screw Collar Includes: 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" and 5/8" with Allen Wrench

["Eight-Piece Complete Tool Kit: This comprehensive tool kit includes eight different sizes of drill bit stop collar set: 1/8 inch, 3/16 inch, 1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch, and 1/2 inch, and comes with a dedicated Allen wrench for easy screw adjustment","Rugged Solid Steel Construction: Each drill bit depth stop is precision-machined from high-strength solid carbon steel, capable of withstanding harsh working environments. The black finish not only enhances corrosion resistance but also ensures long-term durability, making these limit rings a reliable long-term partner in your toolbox","Easy to Use: These easy-to-use depth drill bit depth stop let you drill without guesswork. Featuring steel set screws, these limit rings securely lock into place on the drill bit, allowing you to quickly and reliably drill to the same precise depth. This is crucial for production work or any project requiring consistent, precise hole diameters","Multi-Functional Drill Bits: These drill bit stop collar set are designed as multi-functional bushings, ideal for preventing dangerous over-drilling. They fit perfectly with center-position drill bits and are suitable for a wide range of applications, from delicate ceramic and plastic machining to heavy-duty woodworking","Intelligent Design: The drill bit stop collar set are precision-designed to provide a vise-like clamping force when tightened without damaging or scratching the drill bit surface. This ensures your valuable tools always remain in perfect condition while giving you complete control over drilling depth"]