To answer the OP, just get some of the 4 jaw crimpers that eBay is awash with, and make sure you give them a good squeeze when crimping the bootlaces on.


The main key to a good crimp, is to use the correct size of crimp for the wire.
You should always be using the smallest crimp that will fit the wire.

One issue I see far too often, is everybody likes to default to blue insulated crimps (they're designed for 1.5 - 2.5mm˛ cable), when they should be using red ones (for 0.5 - 1.5mm˛ cable), which means they don't crimp correctly and you end up with bad connections.