You must be over the age of 18 to purchase this product. FatMax® Utility Blades. FatMax® snap resistant utility blades. These Stanley blades are up to 20% stronger and 35% sharper than standard 1992 Stanley blades. With up 75% longer tool life. Features and Benefits. 20% Stronger than 1992 blades 35% Sharper than 1992 blades Snap resistant up to 35 kg Longer tool life