In the comments section of a recent post someone asked for advice on removing a broken screw at the bottom of his pool. Though the simplest answer seemed to be a hand-cranked drill brace with a left-hand drill bit, other readers suggested a pneumatic drill or a cordless electric drill. This piqued my curiosity about the underwater tool industry, which I knew little about — so I went looking to discover what’s out there.
Not surprisingly, I didn’t find any electric tools designed for underwater use. Hydraulic tools in general seem to be marketed largely to the railroad industry, but a third-party company called Steffen Inc. has modified a hydraulic tool — the Stanley Hydraulics SK58 sinker drill pictured on the left — and marketed it as an “underwater” tool. It’ll drill holes 3″ in diameter and many feet deep, a good size for blasting, in stone and concrete.
Steffen’s modifications void the warranty from Stanley — duh — but Steffen will warranty the modified tool. The image on the right comes from Steffen’s website; their description mentions a fourth hose, but I can’t see any difference from the tool on the left.
How’s that for overkill to remove a broken screw in a pool?