Got it, now lets say you start to make about 15mm hole; how deep a depression do you get in about one hour? This just to get an idea how long it takes to make a hole let's say 4cm deep/long.
Constant work ?
You'll be right through it in forty minutes.....well that was something grey and hard and had been rumbled about in a glacier and we lifted it from the loch foreshore.
Sandstone and you'll be through it in quarter an hour....if you have good grit
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.