Metal Cutting Reciprocating Saw Blade, 8 in L x 3 4 in W x 0.035 in Thick, 18 TPI, 50 EA PK ORS NASCO regular duty with extra deep throat Black regular duty with extra deep throat Black oxide spindles and perma pad® resist corrosion and are replaceable Innovative frame geometry for maximum strength pipe notch for attaching to pipe Holds common angles with superb strength and gets into the smallest places On Off allows precise placement Fast set up on most common angles for small pieces Power Blast Technology™ is a high speed blasting along the cutting edge that strengthens the blade to reduce breaks and increase durability Patented T2™ Technology reduces cutting forces on each tooth and optimizes chip removal to allow efficient cutting in the widest range of materials Patented metal cutting TPIs provide faster and more efficient cutting in the widest widest variety of materials and more