1. Features Titanium combination drill taps are made of HSS 4341, which can ensure sharp and fast execution while maintaining strength and efficiency. The surface is treated with titanium alloy, which greatly improves the cutting performance of the drill bit, is more wear-resistant, and prolongs the service life. 2. Specifications Material: HSS 4341 Surface treatment: Titanium plating 1/4 inch hex shank (quick change of impact drill) Size: SAE-6-32NC 8-32NC 10-24NC 10-32NC 12-24NC 1/4-20NC 3. Package includes 6pcs Titanium Combination Drill Tap Set 1 storage box 4. Note: Be sure to wear safety glasses during operation, and keep your hands or face away from rotating drill bits and cutting powder. Please read the instruction manual of the power tool you want to use carefully, and follow the warnings and precautions of each manufacturer to ensure safe operation.