Double Ends HSS twist drill bits are economical twin-tip cutting tools widely used in metalworking, maintenance and sheet metal fabrication. Built with two fully functional twist drill heads on one straight shank, this “one bit, two cutting ends” design doubles usable service life compared with standard single-end drill bits.
Item Specification
Material HSS 4341 / M2 / M35 cobalt HSS
Point Angle 118° standard or 135° split point
Flute 2 spiral flutes
Size Range 2.0–6.5mm, metric & imperial sizes available
Surface Finish Bright, black oxide, amber or titanium coating
The 135° split point delivers self-centering performance and prevents bit wandering, so you get accurate holes without pre-punching. Precision-ground spiral flutes quickly evacuate metal chips, lower friction and heat buildup for smoother cutting. Made of heat-treated high-speed steel, these bits feature excellent hardness, wear resistance and thermal stability.
The biggest advantage is cost efficiency. Once one cutting tip wears out, simply reverse the bit in your drill chuck and continue working, cutting tool change downtime and inventory costs.
They are ideal for drilling mild steel, aluminum, copper, thin stainless sheets, plastic and wood. Widely compatible with hand electric drills, cordless drills and drill presses, perfect for auto body repair, sheet metal work, hardware manufacturing and DIY projects.
Q&A
Q: Are double ends HSS twist drill bits suitable for thick stainless steel?
A: M35 cobalt grade works for thin stainless sheets; for thick hard stainless, choose cobalt HSS series.
Q: Can these bits be resharpened after both ends wear?
A: Not recommended. They are disposable consumables designed for two-time use.
Q: What surface coating option reduces friction best?
A: Titanium coating provides lower friction and better anti-wear performance than black oxide finish.
