Hooked Blades, these are excellent blades for the vinyl, hard flooring and carpet fitting trade. They fit the Dolphin knife favoured by carpet fitters. Packed in 100 units in plastic safety boxes. This product is made in Sheffield England to a very high standard. It is of standard pattern design and will fit most knife handles including the Dolphin knife. (Please note:- these are very sharp hooked blades which needs care when handling you must be 18 or over to purchase this product.)