Scope of application: Boxlink base fasteners are compatible with 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ford truck F150, F250, F350, and Raptor models; Replace OE # FL3Z99000A64B/FL3Z-9928408-AB. Design meets or exceeds OE specifications. Easy to install: Easy to install without any tools, simply slide the clip into the fixing bracket and lock it with a key. Suitable for Ford detachable tiedowns. No drilling is required. Excellent quality: The bed clamp box connection anchor is made of die-cast zinc, equipped with a heavy-duty ABS plastic shell and stainless steel locking components; The surface is sprayed with black anti-corrosion paint, which has waterproof and corrosion-resistant functions and is suitable for all weather conditions. Safe and reliable: The four box shaped connecting anti slip nails are heavy-duty rings weighing 1000 pounds, which are very suitable for adding mooring points to trucks and firmly fixing items inside the truck base Package includes: a set of 4 fastening anchors and 8 keys, excluding the plates and screws for the fixing plate.