Diamond coated core hole saw with pilot bit for glass or tile,marble this is the fastest boring bit for glass.These are the right size for the job and a heavy duty 3/8 inch shank. Plus this kit is priced at what just one of these hole saws cost anywhere else.



These hole saws with a pilot bit made drilling glass a whole lot easier. The pilot bit keeps the hole saw in place so you do not have to make jigs or backing plates of any kind. The hole is right where you what it! Plus these have a thicker diamond coating so you do not have to replace it as often.

The bits all come with very extensive instructions and full tech support that will have you drilling like a pro. With my package even a cave man can do it! Bit sizes are 1 1/8 inch 28mm perfect for a 1/2 inch bulkhead for 1/2 inch pipe. 1 1/2 inch 38mm for 3/4 inch bulkhead for 3/4 inch pipe, 1 3/4 inch 45mm for 1 inch bulkhead 1 inch pipe, 2 3/8 60mm for 1 1/2 inch bulkhead 1 1/2 inch pipe.


Suitable for use on glass, marble, tile or granite.

Why is this bit the best one for aquariums? Well first of all it is the least expensive and the fact that being diamond dust coated it makes the smoothest cut possible. Anytime glass is cut or drilled, micro fractures always occur along the cut, this bit makes the least fractures.

While tanks are generally "over engineered" to be much stronger than actually needed for their capacity, the bottom is the "weakest link" and should generally be avoided. This bit is not for tempered glass, tempered glass can not be drilled