Milwaukee 48-42-5540 4-Inch, 10 Teeth per Inch, High Carbon Steel Jig Saw Blades, 5-Pack The product is easy to use The product is durable The product is manufactured in Switzerland 10 TPI, 4 in. Length, High Carbon steel Construction 9/32 in. Width, T-Shank 5 blades per package Reverse tooth construction prevents top splinters when cutting in wood. Limited Warranty