Busch 4203 4 Groove Carbide Twist Drills on 3/32" Shanks .70mm to 2.30mm Drill Size:.90mm Total carat weight range: 7/8

Total carat weight range: 7/8 ct – 1 ct (diamond weights)

copper-based alloys

this mounting reflects consistent quality and craftsmanship

radius on the other — cut on both sides

Busch 4203 4 Groove Carbide Twist Drills on 3/32" Shanks .70mm to 2.30mm Drill Size:.90mm Total carat weight range: 7/8The Busch 4203 series carbide twist drills feature a 4 groove design optimized for cutting softer organic materials such as coral and pearls. Mounted on 3 32" shanks, these drills are available in 13 sizes ranging from 0. 70mm to 2. 30mm, making them a versatile addition to any jeweler's or craftsperson's drill collection. Sold individually, each drill delivers outstanding service life when used correctly. For best results and longest tool life, use