Is the above item worth £20 + £7 for a spare bit? It's intended use is chasing in a new ring main and 2 x lighting switches in my (if it ever happens) kitchen.
By way of explanation behind such rash expenditure the walls are made of a peculiar white brick which shatters as soon as you look at it. Previously I have used an angle grinder (fantastically messy) and bolster (very boring) to cut the chases and wondered if Screwfix's magic toy was worth the cash.
TIA Richard