7″ Razor Max Blade, .325″ Pitch. Designed for fast & easy cutting of small trees, heavy brush, thick weeds & grass. Suitable for petrol powered trimmers & brushcutters with engines 300cc & above. Also designed to be used on circular saws to cut through wood, linoleum, fibreglass, Plexiglass etc. Designed to operate at a maximum 10,000 rpm. Chain kits available.