Suwinus HSS Step Drill Bit 3-Piece Set Titanium Coated Spiral

Step Drill Bit,Knoweasy HSS Titanium Coated Spiral Grooved Step Drill 3 Piece Set With Automatic Spring Loaded Center Punch4 12mm4 20mm4 32mm Drill Bits Set For Sheet Metal Hole Drilli 2d0715ff E838 4814 Ad82 898fde5867cc 600x 【HSS Titanium Coating】High speed steel along with titanium coating ensures outstanding durability and sharpness, can reduces the frictionand drills with less heat , runs cooler. Made from classic High Speed Steel (HSS) with advanced titanium coating technology, this drill set reaches new heights in drilling efficiency and durability 【Two-flute Spiral Grooved Design】Two-flute spiral grooved design deburrs chip, dust and debris for clearance and smooth cutting. The text discusses the importance of manufacturing and workshop practices in engineering education, emphasizing the necessity for students to acquire both... 【31 Step Sizes】13 step drill (1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32, 1/2-inch) 6 step drill (3/16, 1/4, 5/16, 3/8, 7/16, 1/2-inch) and 12 step drill (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8-inch) Mm HSS Titanium Step Tap Drill Bit Set - Spiral Grooved Metric Combina For Metal Wood 【6 months After Sales Warranty】If you are not fully satisfied with our product for any reason, please contact us for 100% refund or replacement.