These blades offer teeth varying in size, set and gullet depth. This variation brings teeth into the work at constantly changing angles for faster, smoother and quieter cutting. The varying gullet sizes also allow increased protection against tooth strip page when cutting on a wide range of materials and/or -Metal Matrix II blades provide faster cutting rates, increased longevity (Up to 10 times longer life than carbon flex back and hard back). Excellent toughness, shock and abrasion resistance.