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Product Description
Rail Mount for 12mm load rails at 57mm spacing. 2 holes at 24.5mm spacing (0.1" diameter for 2-56 threaded brass inserts).
(NOTE: Threaded inserts not included, other thread options can be available on request, i.e. sized for 3x.05mm threaded inserts, or through holes for tapping.)
Designed around GoodLuckBuy landing gear load rails:
http://www.goodluckbuy.com/atg-universal-diy-fpv-carbon-fiber-anti-vibration-multifunction-landing-skid-kit-for-dji-f450-f550-quadcopter-hexacopter.html