Treet 7 Days Platinum double edge blades fit all double edge razors. Treet 7 Days Platinum blades are made from the highest quality steel. Each Treet 7 Days Platinum blade provides unsurpassed quality, smoothness and durability for a long lasting, smooth shave. Additional Details ------------------------------ Product description: Treet 7 Days Platinum double edge blades fit all double edge razors. Treet 7 Days Platinum blades are made from the highest quality steel. Each Treet 7 Days Platinum blade provides unsurpassed quality, smoothness and durability for a long lasting, smooth shave.