Freud DS0014S Nail-Embedded Wood and Metal Demolition Reciprocating Blade Set, Red (4) DS0614BF, (4) DS0614BGP, (4) DS0612BW, (1) DS0912BW, (1) DS0914AFC 6-inch blade length, 9-inch blade length Bi-Metal blade Ultra hardened cutting edge for up to five times longer life than standard blades