CNC V3-JR 1.25(#4-40) Gold
Material: aluminium 6061-T6 (anodized)
Fixing screw bolt is #4-40
#4-40 Bolt is not included
They don't fit JR servos. Splines in the servo arms appear they were not fully machined to the correct spline depth. There's spline on about 1/8th of an inch in the arm where it's supposed to go down over the servo output shaft. The spline machining should go all the way down into the servo arm, not just the outside 1/8th inch. Not worth returning, so they're headed for the garbage bin now.These fit standard size servos only, nothing smaller is going to work. Hobbyking needs to add more details regarding dimensions.