These are the Traxxas 3x4mm and 4x4mm Set Screws.
FEATURES: Constructed of steel
Also known as grub screws
INCLUDES: Eight 3x4mm set screws in black.
Four 4x4mm set screws finished in natural finish.
REQUIRES: 2mm hex wrench for 4x4mm screws
1.5mm hex wrench for 3x4mm screws
COMMENTS: For use in Traxxas kits or any application requiring these size set