HoldFast clips are produced by the well established 'Shell Moulded Process' which enables all castings to be very accurately produced and consistent to the drawings, to comply with B.S.E.N. GJS 1563 and DIN 1693.
The clips are designed so that they can be tailor made for any rail section.
The clips accommodate rail expansion and contraction due to climate conditions, even though the rail is held in positive lateral alignment.
Clips are fitted in pairs, opposite each other, with calculations determining both diameter and longitudinal centres of fixing bolts.