NEW FIVE STAR HOBBIES TITANIUM SLIPPER ELIMINATOR DESIGNED FOR HEAVY DUTY APPLICATIONS.. THICKER MOUNTING FLANGE HELPS TO ELIMINATE STRIPPED THREADS WHEN TIGHTENING DOWN YOU SPUR GEAR. DESIGNED FOR ASSOCIATED BASED TOPSHAFTS BUT WILL ALSO FIT THE EXOTEK TOPSHAFT FOR THE VADER..TIGHTER TOLERANCE ALSO HELPS ELIMINATE ROUNDING OFF OF THE TOPSHAFTS. COMES WITH 3 M3X6 SCREWS. DOES NOT COME WITH SCREW FOR HOLLOW TOPSHAFT APPLICATIONS AT THIS TIME