3" 14TPI T-Shank Metal Cutting Bi-Metal Jig Saw Blades 5PK

What it is:

The 48-42-5190 is a Milwaukee 3" 14 TPI bi-metal T-shank jig saw blade set (5-pack) built for cutting thick metal.

Key specs:

• Blade length: 3 inches
• TPI: 14 (coarse for metal)
• Material: Bi-metal
• Shank: T-shank (modern quick-change)
• Pack size: 5 blades
• Best for: Metal over ~1/4" thick

Key features:

• Bi-metal construction: Longer life than HSS or carbon blades
• Aggressive 14 TPI teeth: Faster cutting in thick materials
• Heavy-duty design: Built to handle tougher cuts without breaking
• Fast shearing action: Tooth geometry optimized for speed in metal
• Universal T-shank fit: Works with most modern jig saws

In plain terms:

This is the most aggressive metal-cutting jigsaw blade in the group you’ve been going through.

Best for:

• thick steel
• heavy-gauge metal
• pipe / conduit
• fabrication work

Compared to your other blades:

• 5161 (24 TPI): thin metal / clean finish
• 5121 (18 TPI): medium metal / balanced
• 5190 (this – 14 TPI): thick metal / fastest cutting

Lower TPI = fewer teeth = faster, rougher, stronger cuts

Simple takeaway:

• 48-42-5190 = heavy-duty metal blade (T-shank)
• 14 TPI = aggressive, fast cutting
• Best for thick metal (1/4"+)
• This is your go-to blade when lighter ones bog down or burn out