They need a sawzall with a plexiglass dome over the front half (cutting area) so that sparks are contained from the atmoshpere of the tool opeator.
In my imagination (fwiw), they would be drilling and cutting from top down. from under, they would have all the hydrogen gas trapped at the top in a bubble, and it would be impractical to work there due to (if nothing else) to sparks emanating from the commutator on the drill motor as it rotated past the brushes.