Crinkle mesh stone guards look great on some vintage or period cars & these will clip onto your 5.3/4″ headlamp unit offering unique styling and some protection from stones chipping your headlamps. Sold as a pair chrome plated finish. Headlamp Stone guard Fitting. The same applies for 7? or 5 3/4? diameter on conventional headlamps there are 3 retaining screws that hold the headlight into the bowl nest unit & the 3 x sprung clips supplied attach to these retaining screws the clips then protrude between the glass lens and inside edge of outer trim ring the stone guards simply snap onto these clips. For headlights that do not have the same fixings or the outer trim ring is tight against the glass lens such as independent headlights then you will have to adapt the clips by attaching them with screws or rivets to the outer trim ring.