1/8" dia. shanks are larger than the standard 3/32" tools most used by jewelers. These larger tools fit most adjustable chucks but will not fit most quick-change handpieces.
Bud/Flame Burs have a gently curved taper that comes to a point. Similar to a cone bur, they are useful for tapering, enlarging holes, or repositioning holes, and for a variety of stone setting tasks.
Carbide Steel burs maintain their sharpness longer than any other steel. They are more brittle than carbon steel and hss and are more likely to break or chip if mishandled.