10 Pcs 1.80 mm HSS Straight Shank Twist Drill Bit Set, Jewelry Beads Punching Tools with Storage Box, Industrial Metal Wood Plastic Drilling Accessories
10 Pcs 1.80 mm HSS Straight Shank Twist Drill Bit Set, Jewelry Beads Punching Tools with Storage Box, Industrial Metal Wood Plastic Drilling Accessories
Industrial Grade Material: HSS with 62-65 HRC hardness; Maintains cutting edges integrity through 300°C continuous operate; Withstands repeated friction in stainless steel jewelry blanks, hardwood inlay work and ABS plastic fabrication
Optimized Flute Design: 30° helical angle with polished grooves; Efficient chip evacuation prevents clogging during deep hole drilling; Enables smooth 1.75-1.85 mm perforations in aluminum plates, and circuit board substrates for craft production
Secure Shank Configuration: 6.35 mm (1/4 ) straight shank standard; Compatible with bench drills, rotate tools and punching presses; Eliminates bit slippage during accurate operate like watch component repair and leather strap hole punching
Storage System: Shock-absorbent plastic box with foam inserts; Prevents tip damage during tool bag transportation; Color-coded slot design streamlines bit selection for jewelry workshops and electronics repair stations
Multi Industry Application: 118° split point penetrates brass findings, acrylic sheets, and soft alloys; Essential for creating pilot holes in eyeglass frame adjustments, model kit assembly, and PCB board modifications