Blade Tools, are the knives and various tools that fold out of your World Heritage Knife. Common tools examples found on multifunction knives are fish scaler, file, scissors, cork screw, bottle opener, leather punch, and screw drivers. Less common but very handy tools are pliers, lace puller, wire strippers, magnifier, fork, wood saw, and spanner. And ofcourse it wouldn't be a knife without atleast one knife blade.
There is no limit to what CAN be put on the World Heritage Knife, someone maybe you, just has to design the blade tool for it.