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Hi! We're the Strong Family - Ann, Joseph and JJ. We've been working on cars and DIY'ing since we can remember. So, back in 1983, when a shattered grinding wheel nearly caused serious injury while we were working on our Bluebird Bus, we decided to come up with a tool that was safer, stronger, better. That first tool has lead to a whole line of 'em and for three generations now our family-owned company has been making specialty cutting and drilling tools that tradesmen and DIYers alike can count on - all backed by our Lifetime Guarantee.

Individual Multi-Purpose Drill Bits

4.5" Heavy Diamond II - ENDLESS Cutting + Grinding Wheel

4.5" HDII Flange - ENDLESS Flush Grinding + Cutting

14 Piece Bad Dog Multi-Purpose Drill Bits

Individual Rover Bits

3" HDII - ENDLESS Cutting + Grinding Wheel

19 piece Bad Dog Multi-Purpose Drill Bits

1.25" HDII - ENDLESS Cutting + Grinding Wheel

Dried Drool Cutting Wax

5 Piece Rover /Forstner Bit Set A - Fast Cutting Forstner Bits

How to Start a Diamond Hole Saw Without It Wandering All Over Your Tile

One of the hardest parts of using any hole saw is getting it started. Set a diamond hole saw straight down on porcelain tile and pull the trigger, and there's a good chance it skates across the surf …

Posted by Joseph Strong on 16th Sep 2026 Mechanical Engineer & Third-Generation Tool Designer at Bad Dog Tools

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The Right Diamond Hole Saw for Porcelain Tile — And How to Use It

You’ve got a beautiful porcelain tile wall going in, and one thing standing between you and a finished bathroom: a hole. Shower valve, tub spout, towel bar anchor, a supply line that has to co …

Posted by Joseph Strong on 10th Sep 2026 Mechanical Engineer & Third-Generation Tool Designer at Bad Dog Tools