Due to its short working part, the twist drill 4205S is an easy guiding tool to produce precise, uniform holes in very narrow spaces as necessary for tight pavé settings. When working on jewellery materials which are difficult to cut, such as platinum, titanium and steel or gold, silver and their alloys, numerous holes can be drilled with constant precision after centering, using this tool made of finest grain carbide.
Busch super carbide burs are made of high performance carbide steel. Using a special process that bonds the carbide head to the steel shank (unaffected by heat), these burs are constructed to assure exact concentricity. Busch super carbide burs are very durable and wear-resistant, even under unfavorable clearance conditions.
They are sold individually
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