B Swiss Tools chisels are made of high-quality oil hardened steel. The high degree of hardness guarantees long-term sharpness and high durability. In industry, on the construction site and in various trades, PB Swiss Tools chisels will stand up to the toughest demands.Blunt edges can be sharpened again and again. In order to avoid annealing, the temperature must not exceed 200 癈 (sharpen wet). All PB Swiss Tools chisels are provided with attractive rust protection: Octagonal chisels are nickel- and chrome-plated, the flat oval ones have a durable, easy-to-grip powder coating.