Diamond Sand Grinding Concave Wheel 

Outer Diameter: about 20mm
 
Handle Diameter: 6mm 

Concave Wheel  width: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm 

Grit:  Coarse Sand (150#)/ Fine Sand (400#) 

Coarse sand: advantages: high grinding efficiency and quick molding 

Fine sand: fine sanding, good effect, low efficiency, slow molding, no grinding
 
Suitable for: Grinding glass round edges, ring grinding pit wheels. 

Diamond grinding wheel for precision machining of glass, glass thickness, jade, jade, agate, pearls and other building materials. all kinds of metals / jade / wood / cast iron / cast steel / carbon steel / alloy steel / stainless steel / copper / aluminum and marble / jade / bone and other non-metals.