Description: This is a ten piece set of lapidary grade core drills. They are best suited for a drill press and are great for hollowing out the inside of stone ring shanks, as well as making large bead holes.

Made In: China

Drill Bit Sizes: 6, 8, 10, 12, 14, 16, 18, 20, 22, 30mm 
Shaft Diameters range from : 5.4mm-8.3mm
Overall Length: 50mm

Weight of all drill bits : 160g
Quantity: 10 Piece set