Diablo DJT121AF5 Bi-metal Jig Saw Blades 21 Tpi 5-pack

Product Description

The DIABLO DJT121AF5 is a 5-pack of bi-metal T-shank jig saw blades engineered for cutting medium metal. Each blade runs 3-5/8 inches in length with a 21 teeth-per-inch (TPI) mill-tooth configuration, making it well-suited for clean, controlled cuts through sheet metal, conduit, angle iron, and similar medium-gauge metal stock. The bi-metal construction pairs a high-speed steel cutting edge with a flexible alloy steel body, balancing edge retention with resistance to blade breakage under the lateral stresses common in jig saw work. Licensed electricians, HVAC technicians, plumbers, and general contractors all reach for blades in this TPI range when working metal in the field or on the bench.

These blades are appropriate for residential and light commercial applications where tradespeople need to cut metal framing, electrical enclosures, ductwork components, or pipe with a jig saw. The T-shank interface is the industry-standard fitting for most modern jig saws, providing a tool-free blade change. The 21 TPI count produces a finer cut than general-purpose metal blades, reducing burr formation and cleanup time on thinner metal profiles. Contour-cutting capability allows the blade to follow curves and irregular cut lines, useful when fitting conduit knockouts or trimming sheet metal flanges.

Key Features

• Bi-metal construction: high-speed steel teeth bonded to a flexible alloy steel body for durability and break resistance
• 21 TPI mill-tooth configuration optimized for medium metal stock
• T-shank interface fits most modern jig saws with tool-free blade changes
• Contour-cutting capable for curved and irregular cut lines
• 3-5/8 inch blade length provides adequate depth clearance for typical metal-cutting tasks
• Sold in a 5-pack for job-site value and consistent blade replacement

Compatibility

Designed as an OEM-style replacement T-shank jig saw blade compatible with most jig saws that accept the standard T-shank fitting. Intended for use on medium metal material applications.

Installation Notes

T-shank blades are installed and removed without tools on compatible jig saws — confirm the saw is powered off and unplugged before changing blades. Wear cut-resistant gloves when handling jig saw blades, as the toothed edge presents a laceration hazard. When cutting metal, use the appropriate saw speed setting and apply cutting fluid where the material and saw permit to extend blade life. Dispose of worn blades in a puncture-resistant sharps container.