The Malco 4KH8 is a 6" X 3/4" X 0.049 reciprocating saw blade with 8 teeth per inch and a standard tooth form. The 4KH8 features a Key Hole Profile that produces less vibration is smoother and makes cleaner cuts in wood with nails and composition board. BiMetal blades are shatterproof and are formulated from a premium metal composition consisting of a High Speed steel cutting edge micro welded to a flexible High Carbon Steel Back. The BiMetal combine with Malco's superior manufacturing processes outperform and outlast other similar blades.