General description This Draper 17-Piece Metric Combination Drill Bit Set includes 12 high-speed steel straight shank drills coated with titanium nitride for enhanced durability and performance, along with five tungsten steel masonry drills designed for tough materials. The set is conveniently stored in a soft grip plastic case for easy organization and transport. Technical specifications Number of drills: 17 (12 high-speed steel, 5 masonry) Coating: Titanium nitride on high-speed steel drills Shank type: Straight Material: High-speed steel and tungsten steel Compatibility and accessories Suitable for use with standard drill chucks Compatible with various power drills for metal, wood, and masonry Installation No installation required; simply insert the drill bit into the drill chuck and tighten securely Usage Use the appropriate drill bit for the material you are working with Apply steady pressure during drilling for best results Wear safety goggles to protect your eyes during use