• 24 sizes individual drill bits in 3:This set includes three standard step drill bits that replace 24 individual drill bits
• Strong durability :Made of strong m2 steel with titanium coating, the bits have strong durability
• Easy drilling:Two-fluted design provides faster, smoother cutting, provided with small pressure and the sets
• Automatic center punch:Delivers an automatic, high-impact, spring-loaded strike when pressed against surface, adjustable cap regulates striking force
• Wide usage:Marks hole locations and starts drill bits and screws, preventing wandering

Specification:
Material: HSS
1/4" Hex Shank
Sizes:
4-12mm:4,6,8,10,12mm
4-20mm:4,6,8,10,12,14,16,18,20mm
3-12mm:3,4,5,6,7,8,9,10,11,12mm
4241 High-Speed Steel HSS (Suitable For Use In The Workpiece, Hardness Of 25 Degrees Such As Carbon Steel, Plate, Insulation Board, Wood Board)