we are manufacturer of electroplated diamond coated glass hole saw drill bits special for making hole in glass, ceramic, granite, fiberglass pultrusion, frp product, toughened glass, sand stone, lime stone, glass. we make 6 mm to 450 mm electroplated diamond coated glass hole saw drill bits. 

we are manufacturer of electroplated diamond coated glass hole saw drill bits special for making hole in glass, ceramic, granite, fiberglass pultrusion, frp product, toughened glass, sand stone, lime stone, glass. we make 6 mm to 450 mm electroplated diamond coated glass hole saw drill bits.