Busch 4205S 2 Groove Short Carbide Twist Drills 3/32" Shanks-0.70mm to 1.0mm-By the Piece

The Busch 4205S short carbide twist drills are purpose-built for one critical application: drilling precise holes in hard metals for pavé diamond setting. The short length is intentional — pavé holes are relatively shallow, and longer drills are prone to breakage under torsional stress. These drills deliver the control and reliability that exacting stone-setting work demands.

Developed through a partnership between Busch of Germany and the world's finest micro-diamond setters, the 4205S series has become the go-to solution for what was once a drill-breaking nightmare. These carbide twist drills are trusted by setters working for the most prestigious jewelry names in the industry.

The 2-groove design actively expels material from the hole during drilling, reducing heat buildup and extending drill life. Suitable for use on platinum, high-karat white alloys, titanium, steel, gold, silver, and other metal alloys. Not for use with glass, ceramics, or gemstones. Also available as a kit of four — see part number BAU128.400.

Features

• Short-length design minimizes torsional stress and reduces drill breakage during pavé setting work
• Solid carbide construction for use in hard metals including platinum, titanium, and high-karat white alloys
• 2-groove geometry expels swarf from the hole, extending drill life and improving hole quality
• Developed in collaboration with professional micro-diamond setters and Busch of Germany
• Suitable for gold, silver, platinum, titanium, steel, and other metal alloys
• Sold individually — choose only the size you need

Specifications

Available Options