Imperial Blades' Starlock 1-3/4 in. standard metal blade is composed of heavy-duty bi-metal for up to 5X longer life than standard Imperial high carbon steel blades. The wavy set tooth pattern makes this blade ideal for metal and multi-material applications by dispersing the wear on all teeth. Popular projects include deck maintenance, fence repair, flooring, framework with nails or staples and plunge cutting vents and outlets.