Variable pitch blades can handle solid cutting as well as interrupted cutting such as tubing, etc.
The variable pitch combines regular teeth of different pitches, gullet depths, and set angles.75 W, 4-6 TPI, Premium Bimetal These are primarily used for steel sawing, but also can be used for sawing non-ferrous materials and wood. Variable pitch gives smoother cuts, faster sawing, improved chip clearance, and longer blade life. Bimetal blades will give lower cost for you per cut on tough sawing jobs.