1350W Wall Chaser, 11 000 min-1, Adjustable Depth, 4.2kg

A wall chaser cuts the channel that conduit, cable and pipe are buried in. The alternative is a hammer and chisel, which gives a ragged chase of uneven depth that takes twice the plaster to close up and looks it afterwards. A chaser cuts two parallel lines at a set depth and you knock out the strip between them.

It is an electrician's and plumber's tool for first fix work: running conduit down a block wall to a socket box, dropping a pipe run into a wall before plastering, and chasing out a wall that has already been finished when a circuit has to be added. The 1350W motor runs at 11 000 min-1, and the depth is adjustable, so you cut just deep enough to bury the conduit without cutting into the block further than you need. The dust ejection port sends the waste away from the line rather than into your face, and there is a safety switch on the on and off trigger. It weighs 4.2kg and comes in a storage case.