The blades are made of ice tempered, stainless steel to maintain lasting sharpness. They are very sharp shear blades. With regular use, the blades will last about 9 to 12 months. Choose: 45, 55, 65 or 75 (45 fits either 4" or 4 1/2" shear, 55 fits either 5" or 5 1/2" shear, etc).
