Milwaukee 5 Piece Jigsaw Blades Set suitable for applications in wood, plastic and metal. T 144 D is a Fast Cut Blade for wood and plastic with sharp and aggressive tooth geometry making it ideal for very fast cutting of wood. T 101 B is a Clean and Splinter Free Cutting Blade for wood and plastic which has diagonally sharpened side teeth resulting in a very clear splinter free cut. T 118 A and T 118 B are Traditional Blades for metal. For those professionals desiring extra lifetime and durability we recommend the use of Bi-Metal blades in conjunction with a suitable cooling lubricant, the blades lifetime is double that of non Bi-Metal blades. The final blade in the set, T 111 C, is a Traditional Blade for use on wood and plastic that delivers a good and solid performance. Features and Benefits • Sharp and Aggressive Tooth geometry making it ideal for fast cutting of wood • Diagonally sharpened side teeth resulting in a clear splinter free cut • Bi-Metal Blades lifetime is double that