This servo adapter is made of 6061 T6 aircraft aluminum It is for use with Hitec Heavy duty servos HS 5755 MG and HS 5765 MG. You can use the arms that come with the Hitec servo, no modifications needed
ATTN: Set include 1 servo adapter and 2 4x16 mm bottom head screw FIT: LOSI 5iveT truck