Diamond dry drill bits
The dry drill bits with bayonet connection belong to an extra light-weight system which enables you to drill by hand up to a diameter of 250 mm.
Due to the special connection you don't need a tool to take off the diamond drill bit. The dust rotor and the corresponding suction make this system almost dust-free. Especially furnace builder like these drill bits as their weight is considerably lower than that of a standard drill bit.
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