Set Contents: φ0.1 x 4.1 inches (3.5 x 103 mm); Groove Length: 1.5 inches (39 mm); Blade Tip: High Hardness HSS (High Speed Steel), Cross Thinning, Body: Special Steel, Cushion Ring: Red, Made in Japan
High hardness HSS (high speed steel) keeps sharp
For drilling and drilling holes for various types of taps, such as iron, light metals, synthetic resin, wood, etc
Cushioning effect reduces wobbling and rattling
Grooved drill integrates with press aperture
X-shaped (cross) thinning for high speed drilling, excellent feeling Drill holes with light force without the need for a center punch (*AMD-3.0 and above)