CCSF Otto Frei Simple Jewelers Kit Prop 65 - Lead-Phthalates whereas Tungsten Vanadium burs are

whereas Tungsten Vanadium burs are machine-cut for uniform consistency

making variable speed control essential rather than optional

A removable

Hardened steel construction for use on non-ferrous metals

the profile height is exactly one-third of the width — producing a distinctively low

CCSF Otto Frei Simple Jewelers Kit Prop 65 - Lead-Phthalates whereas Tungsten Vanadium burs areThe CCSF Otto Frei Simple Jewelers Kit was assembled at the request of the Metal Arts Department at City College of San Francisco, though any student or working jeweler can benefit from its well rounded selection of bench tools. Building on the foundation of the Otto Frei Simple Jewelry Tool Kit, this kit adds several items specifically chosen to support the techniques taught in CCSF's metalsmithing curriculum including four grits of 3M abrasive