large sds chisel bit?

I got an SDS one with the Armeg socket sinking set that's about 70mm wide (ie width of metal back box) so it could probably be bought individually.

Yep, I picked up an 80mm Armeg chisel from the electrical wholesalers the other day.

Toolstation do a 75mm tile lifter which I was looking at the other day as I need to lift some tiles (!). Dunno what the difference is between one of them and a chisel - probably how pointy they are.

I bought a tile lifting one from TS and it was the Heller brand IIRC.

The difference is that the tile bit has a cranked shaft, i.e. it is slightly bent. IMO this allows you to hold the drill at a more comfortable angle and slide the chisel behind the tiles to lift them. If there's another reason, I'm sure someone will correct me shortly!

I'm wanting to remove old plaster from a wall and although the tile bit will do it, I would prefer a chisel that points where the drill is pointing, rather than in another direction!

I did see an Armeg socket sinker and did wonder about that; I'll go and have a closer look. Thanks.

Ahh - it didn't show that in the photo. Pity as I was thinking of buying one for exactly the same purpose!

The clue is in the original post, that you even quoted.

MBQ

If memory's working today, there is or was one in a set of a dozen or so sds chisel & drill bits made by silverline, and stocked by toolsatan.

NT

Armeg make them as part of their box-sinking kit. It should be available seperately...