Caledonian Tiling

Steve,

Im guessing the floor tiles were porcelain or some stone, you need diamond tipped hole cutters for this job, 365 drill as advertised on this sight will sort
you
6mm x 2 (robe hooks, mirrors etc)
8mm x 2 (shower frames, shelves etc)
16mm x 1 (sink feeds, radiators)
30mm x 1 (bath feeds, taps, body jets)
40mm x 1 (sink waste, shower heads)
Free drill plate (to steady the drills)
Full instructions on back of each packout.

Beat that for £39.99!! give them a call and get them delivered.

Hope this helps mate.

Caledonian.