General Purpose Bi Metal Reciprocating Saw Blade, 12 in L x 3 4 in W x 0.050 in Thick, 10 14 TPI, 5 EA PK no checkout 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 Cam action design of male half connector pulls the two halves together Connector covers are molded form a special heat and cold resistant material Covers have no metal liner to rust or corrode Metal parts are precision machined with heavy specially shaped brass extrusion Power Blast Technology™ high speed blasting along the cutting edge 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