these are DeWalt wall dogs these can be used in masonry, wood or
plasterboard if you're using them in masonry or brick you do need to drill
a five millimeter pilot hole first new electrical regulations in the UK mean
that in a lot of cases now you need to use non combustible fixings when you are
fixing metal trunking metal cable trays or unistrut et cetera in escape routes
by using these you can help to comply with such regulations as these are non
combustible these are all 32 millimeters long but they do have different heads
the first one is the countersunk chrome head
the second is countersunk with a white head the third is a wide pan head and
finally the chrome pan head if you fix into wood you do not need to drill a
pilot hole first you can simply drive these fixings straight in using a drill
driver or you can use a screw driver as long as you've got a PH 2 drill or a PH
2 screw driver you can simply drive these straight in
if you need a light-weight fixing for plasterboard these are
ideal because you can screw them straight in and no plug is required
that is a very fast way of fixing to plaster board and for light weight fixings in
plasterboard these are ideal the wall dogs are
designed for use in hard concrete such as concrete that has been poured in
industrial buildings etc if you use concrete bricks or concrete blocks or
normal bricks they are considerably softer so you do need to use a smaller
hole in such materials I'm now going to drill a 4 millimeter
hole into this block at the bottom and we'll see exactly how good these wall
dogs are
these are classed as being a light weight fixing but to show you how good these
actually are I'm just going to drill the one hole then we'll drive in the wall
dog then this block actually weighs 16 kilograms you can quite easily pick that
up using just a one screw so the wall dog is a very quick and easy way of
fixing into concrete masonry etc I've now drilled drill 2 holes in this piece of
concrete I'm going to use a wall dog on the end there so I'm just going to screw
that in using a screwdriver
and then this whole I'm going to use a wall plug
the problem with wall plugs in critical situations is that if there is a fire
there is a good chance that they're going to fail so this is a bucket full
of scrap metal on that side we have the wall dog on this side we have the wall
plug this will demonstrate just what happens if there is ever a fire and what
happens to the wall plugs
you can see that is actually glowing red hot and there's absolutely no sign at
all of that screw failing