Saw blades are graded in 4 categories: Economy, Normal, Premium, & Industrial with industrial being the best made. Normal grade is generally used in the Pallet industry. It cuts faster with less power (heat).  Industrial blades cut smoother have the bests quality of materials, last longer and will take more abuse (heat). The steel is thicker, of better quality, hardened to about Rockwell 46, more precisely made, and laser cut. The teeth are larger made with more exotic & expensive materials and more precision honed.