This Lenox 2018212110R is a 5-piece Lazer Reciprocating Saw Blade. It features T2 technology which enables the blade to cut faster than other blades used in the past and last longer as well. Designed with reinforced teeth, this blade is reliable, especially for a tough cutting job. This saw blade cuts straighter than other abrasives because of its wide blade feature. It has total dimensions of 12" (length) x 1" (width) x 0.042" (thickness) with 10 TPI's. This 2018212110R reciprocating blade is one of Lenox's reliable tool accessories that provides the convenience you need without spending a lot of extra effort and time normally associated with lower quality blades.