Metal Cutting Reciprocating Saw Blade, 8 in L x 3 4 in W x 0.035 in Thick, 18 TPI, 5 EA PK ORS NASCO Cradle Technology™ uniformly contouring to Cradle Technology™ uniformly contouring to patella allowing knee and knee pad to work as one unit EVA foam padding for comfort and cushioning Wide flexible PVC cap provides broad area of protection single flint round 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 including Unistrut