#4203S tungsten drills especially suit steel, platinum, titanium, hard metal alloys, gold, silver.
Recommended Speed: 5,000 - 9,000 r.p.m. (drilling freehand) 8,000 -14,000 r.p.m. (via drill-press).
*Tungsten carbide drills offer superior drilling ability and wear resistance, making this a lasting investment in your harder material drilling applications!