Replacement Blades, shipped direct from Ottawa, CanadaOur extensive range of safety knife replacement blades will extend the lifespan of your detectable safety knife. A blunted blade must be immediately replaced to ensure a clean, accurate cut is made without applying excessive force. Our replacement blades are numbered with the corresponding 'SK' numbered knife. Please ensure all knives & blades purchased are handled with care. You must be 18 or over to buy any Detectamet knife blade.