I want to install a master adsl filter at a friend's place which has multiple lines into a telecom wiring block of some sort.  Web searching suggests this is a krone/110 block, (the austel permit number (C89/83H/DD94) on the block produced no hits but another geekzone thread suggests this is what I need), but when I go to various electrical wholesalers to buy what I believe is the correct tool, I have been shown at least two different and apparently different tools of considerably varying cost ($17 to well over $50).

Now as this is probably a one off job and re-using the tool is probably a little unlikely as we all move to fibre(...) and I personally like to have at least a plan B, i.e. restore everything to untouched state if anything does not go to plan, and I don't want to spend a lot.  I can always cut the wires and rejoin then to restore to scratch.  However, I would prefer to do it properly if I can since noise on the line is the problem I am trying to fix and I don't want to potentially make it worse if for some reason I decide to back out.

I was hoping someone here who has actually used such a tool could give me an actual make/model number or a link so I can be at least sure that I am looking at the right tool before I decide to go ahead.

Thanks.

Brendan