I replaced my Ronthor Reiss R-40-28 with these. The Ronthor Reiss are stapled in a box, have screw holes and come with very sharp small wood screws. Contains 6 pieces. Perfect fit and solidly built. I've ordered 12 more to replace the rest of the broken 50's. I applied some Johnson paste wax to the wood splint and rubbed the rest of the finished wood into the box while taking the boxes out and the boxes are working great again.