Blue Screw Castor in a range of sizes. Screw directly into wooden furniture frames to secure. This is a quality manufactured solid brass castor, Blue finish, with a screw plate. Widely used throughout the furniture industry by furniture manufacturers, upholsterers and interior designers. It has a solid brass frame and wheel. Simply use a screwdriver to screw the castor directly into wooden furniture and then secure the plate with wood screws, which are included. Sold individually. Full dimensions for the castors are at the bottom of this page.