Hakkin 6 PCS Twist Drill Combination Drill and Tap Bit Set Ideal for furniture assembly, house maintenance, DIY work and other home use; Great Tapping Tool for Hobbyists, Modelers or for Professional use, such as Builders and Electricians etc. PRODUCT SPECIFICATIONS: MATERIAL:HSS BIT DIAMETER:6-32NC 8-32NC 10-24NC 10-32NC 12-24NC 1/4-20NC; SHANK TYPE: 1/4 Inch Hex Shank APPLICATIONS:Apply to Low Hardness Materials such as wooden planks, fiberboard, particle board, plywood, plastic, aluminum board, PVC board and other thin plates. PRODUCT FEATURES: [PREMIUM MATERIAL]- This 6 PCS combination drill and tap bit set with hex shank is made of high-quality high speed steel with M35 coating，highly hard, sharp, rustproof, anti-corrosive, durable, ensuring long time use. [VERSATILE]- One metric combination drill bit can complete hole drilling, tapping and countersinking in one operation, satisfying your various needs, highly efficient and time-saving, a must-have drill bit set for your tool box. [UNIVERSAL 1/4” HEX SHANK]- All drill bits have a universal 1/4” hex shank, fitting most power tools.