Gem cutting and polishing disc with 2 components: steel & copper

1. Technical information
– Size: 6 inch & 7 inch – 150mm & 170mm
– Thickness: 10mm
– Hole: 0.5 inch (12.7mm)
– Used to polish gemstones such as Spinel, Ruby, and Sapphire
– The 2-component disc has many outstanding features specialized for quickly cutting and polishing gemstones with a hardness of 8 or higher such as spinel, sapphire, and ruby.
– The outer steel part uses W10 polishing powder to cut, the inner copper part uses w0.5 diamond set to polish.