Variable pitch blades can handle solid cutting as well as interrupted cutting such as tubing, etc.
Bimetal blades are welded by an electron beam under high vacuum to attach the strip of high speed M2 teeth to the spring steel back.Premium Bimetal Bandsaw Blade, 157 L, 1 W, 6-10 TPI, Premium Bimetal These are primarily used for steel sawing, but also can be used for sawing non-ferrous materials and wood. A win all around. Variable pitch gives smoother cuts, faster sawing, improved chip clearance, and longer blade life.