3-5/8" 14TPI U-Shank Metal Cutting Bi-Metal Jig Saw Blades 5PK

What it is:

The 48-42-2190 is a Milwaukee 3-5/8" 14 TPI bi-metal U-shank jig saw blade set (5-pack) built for cutting thicker metal.

Key specs:

• Blade length: 3-5/8 inches
• Teeth per inch (TPI): 14
• Material: Bi-metal
• Shank type: U-shank (universal fit)
• Quantity: 5 blades
• Application: Metal cutting (especially thicker materials)

Key features:

• Bi-metal construction: Longer life than high-speed steel or carbon blades
• 14 TPI tooth design: Balanced for durability and controlled cutting
• Cuts thicker metal: Designed for materials over 1/4" thick
• Fast, clean cutting: Optimized tooth geometry for smoother cuts
• Universal U-shank: Fits many jig saw brands

In plain terms:

This is a step up from basic metal blades.

Compared to finer blades (like 18–24 TPI):

• Fewer teeth = more aggressive cutting
• Better for thicker steel and tougher materials
• Slightly rougher finish, but more durable and faster in heavy cuts

Typical uses:

• thicker steel plate
• heavy-gauge sheet metal
• conduit / pipe
• fabrication work

Where it fits (quick context):

• 0120 (18 TPI): thinner metal / smoother cuts
• 2190 (this): thicker metal / more aggressive cutting
• 0640: wood cutting