Very simple tool.
What it basically does is:
If you have the following Hexpattern ->
0F D7 C2 FF 00 94
and the next time it's slightly different (for example if you want to find a pattern with Cheat Engine) you'll want to use wildcards. Some tools accept "??" as wildcards.
Next time you'll have
0F D7 C2 FE 01 94
instead, for example.
Insert both lines, press a button, and the result should be
0F D7 C2 ?? ?? 94
Nothing more :)