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New 6mm ~ 30mm diamond coat hole saw drill bits(4 pieces total).
Suitable for drilling in glass, marble, ceramic tile or granite.
There are 4 different sizes, a diamond hole drill for each size
Outer diameter 22mm/0.87in
Outer diameter 25mm/0.98in
Outer diameter 26mm/1.02in
Outer diameter 28mm/1.10in
When using these
threaded bits, add water to the coolant and slowly drill