Lapidary Core Drill Set - 10pcs (3-50mm) Bite Mark Approximate Size for 1 piece:

Approximate Size for 1 piece: H 6cm x W 6cm x D 6cm Approximate Weight for 1 piece: g

Obsidian's colour varies

but it is difficult to find gem grade mandarin quartz points

This drive shaft comes with the pulley

Approximate weight of 1 piece: 9g

Lapidary Core Drill Set - 10pcs (3-50mm) Bite Mark Approximate Size for 1 piece: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 and bangles, as well as making large bead holes. Made In: China Drill Bit Sizes: 3, 4, 5, 6, 8, 10, 12, 18, 32, 50mmShaft Diameters range from : 2. 4mm 8. 3mmOverall Length: 50mm Weight of all drill bits: 145g Quantity: 10 Piece set