Cannot be more specific because I have no clue...
But our shower is built from sheets of plastic-ish stuff that is obviously supposed to look like marble - about 1/2" thick.
Seems pretty hard at first look, but I took a pair of el-cheapo scissors and was able to scratch the stuff.
What are the chances I will be able to drill holes in it to install a grab handle - without buying a special drill ?
Techniques for getting the drill started without having it walk all over the place?