T2 Technology? which deliver up to 2X blade life vs. prior models, and 25% faster cuts lowest cost per cut from advances in blade geometry and surface coating technology. The LENOX?Gold?with T2 Technology?reciprocating saw blade features optimized tooth geometry for each unique TPI specification. This design is optimized to minimized friction and heat build-up when cutting through the widest variety of metal materials. T2 Technology?recip blades deliver the longest lasting, fastest and most efficient cutting performance in the industry