Straight Bar Insert 4 (71mm)
Can be arc or fire welded into standard shoes, also the clever design by Jon makes them adjustable by 5mm wider or narrower.
Made from 6mm thick steel so they can be positioned in the shoe either on the ground bearing or frog bearing surface depending on how proud the frog is.
Super easy to weld in as they fit into the frog check perfectly and are available in various sizes, no more having to haul around loads of bar shoes!!