This is the GPM Racing Traxxas aluminum servo mount.
This product includes :
Stainless Steel Flat Head Screw 3x16-2pcs
Stainless Steel Flat Head Screw 3x8-4pcs
Counter Sink Washer 3mm4pcs
Product major function & usage:
Stabilize servo horn
Aluminum 6061 T6 material is a good improvement instead of origial plastic material offer greater stability. Placing the shim below the screw to mount the servo tightly.