2. Diamond core drill bit: one parts and three parts
Outer diameter   22mm 25mm 27mm 30mm 32mm 36mm 38mm 40mm 44mm 46mm 51mm 56mm 63mm 66mm 76mm 82mm 90mm 96mm 82mm 90mm 96mm 102mm 108mm 114mm 120mm 127mm 132mm 150mm 160mm 167mm 180mm 200mm etc.
Length: 350mm 400mm