National 6290 3" x 6" Extra Heavy...
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This extremely hard, high abrasion alloy blade is designed for tough tear up situations. VCT, VAT, wood, tile, lighter ceramic, rescraping thin-set, all carpets, cork, elastomeric coatings, rescraping rubber and urethane coatings. It can hold all edges extremely well.
Suits National machineries 505-W, 550-W, 5280-W, 6280-W, 6280-HD, and ride on machines.