13Pcs M35 Cobalt Twist Drill Bit Set 1.5‑6.5mm Hex Shank Titanium Coated Drill Bits for Stainless Steel Hard Metal Drilling

Product Description13‑piece M35 cobalt‑rich twist drill bit set, size range 1.5‑6.5mm, hex shank & titanium‑coated seven‑step cutting tip. Made of high‑strength HSS‑Co alloy, wear‑resistant, sharp cutting, ideal for drilling stainless steel, iron, hard metal and carpentry. Compatible with bench drill, hand electric drill and lithium‑ion drill. Great for household DIY & metal processing work.Usage Instructions:Secure drill bit tightly into drill chuck before operation.For metal drilling, use proper cutting coolant to reduce heat and extend bit life.Keep vertical drilling angle, apply steady moderate pressure; do not force or over‑press.Avoid using lithium drill below 48V for deep drilling over 50mm; bench drill is preferred.Wear safety goggles and protective gloves while working. Stop immediately if bit gets stuck.