Eklind Tool Co., Chicago, makes a folding set of allen wrenches (8 wrenches ranging in size from .050 to 5/32). It is their Model No. 81. This tool or a similar one will handle the trigger adjustment on the contender along with many other tasks. Mine stays in the range bag that always accompanies me to the range. TC also has a multi-purpose tool that includes the .050 wrench, along with the various screwdrivers for the Contender, and .410 choke wrench. Very handy.