Guhring 90° SpyroTec Countersink set, a revolutionary SpyroTec solution for precision countersinking operations. Engineered with innovation at its core, this set redefines the standards of accuracy and stability in countersinking tasks. Titanium Aluminum Nitride Coating (TiAIN): The countersinks are coated with TiAIN, ensuring exceptional wear resistance and thermal protection. This coating enhances the durability of the tool, allowing for extended use in demanding applications. Convex Cutting Edges with Unequal Helix Angles: The unique design of the cutting edges, combined with unequal helix angles, facilitates a stable and low-vibration cutting process. This innovative configuration minimizes chatter marks, resulting in clean and precise countersinks with every operation. Minimal Vibration, Even with Hand Drills: The advanced construction of the countersinks ensures minimal vibration, even when used with hand drills. This feature not only improves user comfort but also enhances overall accuracy and control during countersinking tasks. Suitable for High-Temperature Applications: The SpyroTec Countersink set is specifically designed to excel in high-temperature applications. Whether working with heat-resistant materials or in elevated temperature environments, these countersinks deliver consistent performance and reliability. Set Contains One Of Each 6.3mm 8.3mm 10.4mm 12.4mm 16.50mm 20.5mm