that'll stop me from chipping my teeth aswell...
Please tell me that was a joke.
Shudder... PDT_007
But seriously, you really do need a spanner or something to make sure the Schaller straplocks are attached safely. Get it really tight so you can feel it squeezing the leather of the strap (...why do so many things connected with guitar maintenance sound vaguely pervy?).
I have a screwdriver with a set of box spanner heads -
extremely useful for straplocks, pots, tuners and even truss rods.