Made of premium Swiss-milled for long life and accuracy 24 pieces jwewlry burs includes assorted shapes and sizes meet your different need Specific 3/32inch shank fits electric drill, hanging mills, bench mills,electric grinders, rotary tool, etc Suitable for silver, jewelry, olive core, beads, ivory, bone, precious soft metal and more Colour:As Shown Material:Metal Package Contents: 5x wave needles (2.0/1.8/1.5/1.0/0.6mm) 5x tight mouth beads (2.3/2.0/1.8/1.5/1.0mm) 5x thick flying saucers (2.3/1.8/1.6/1.4/1.0mm) 5x room-shaped gyro needles (2.3/2.1/1.8/1.5/0.9mm) 4x peach needles (2.3/2.0/1.5/1.0mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.