Swiss Cup Bur Master Kit 27 Pieces. 0.90mm to 10.00mm

Cup burs seat stones and round prong tips, and this master set carries the full working range in one purchase. The Otto Frei Swiss Cup Bur Master Kit collects 27 Swiss-made Tungsten Vanadium Fig. 77B cup burs, one in each size from 0.90mm to 10.00mm, all on 3/32" shanks and stored in a wooden bur box.

Tungsten Vanadium steel burs are machine-made to ultra-high precision tolerances, which gives every bur in the set the same uniform geometry. They cut precious metal smoothly and cleanly with no chatter or drag, a direct benefit of the machine-cutting process. High Speed Steel (HSS) burs are individually hand-cut and vary slightly from piece to piece, while Tungsten Vanadium burs stay consistent from bur to bur. HSS generally offers longer tool life, and Tungsten Vanadium remains the best-selling choice for everyday stone setting work.

Features

• 27 cup burs covering 0.90mm – 10.00mm, one of each size
• Swiss-made Tungsten Vanadium steel construction for uniform precision
• Machine-made to ultra-high tolerance for consistent geometry across every bur
• Cuts precious metal smoothly with no chatter or drag
• Fig. 77B cup bur profile, the most popular bur type in the professional jewelry industry
• 3/32" shank on every bur in the set
• Stored and organized in an included wooden bur box

Notes

Tungsten Vanadium burs are not as long-lasting as USA-made High Speed Steel burs. HSS burs are individually hand-cut, so no two are exactly alike, while Tungsten Vanadium burs are machine-cut for uniform consistency. Tungsten Vanadium burs typically cost less than HSS alternatives, which makes this set a strong value for high-volume setting work.