Titanium lockingcaptured hinge pin set with 2mm hex head for the EB410. Eliminates the problem of the rear hub hinge pins sliding out of the arms during impacts. Securely holds the hinge pins and hubs in the rear arm, thanks to the captured pin and lock nut design. NOTE: a 3mm drill bit or reamer is needed to open the front small hole of the arms for the pins to pass through.