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The KLEIN TOOLS 1224bi is a 100-pack of 12-inch bi-metal hacksaw blades ground to 24 teeth per inch (TPI). Bi-metal construction bonds a high-speed steel cutting edge to a flexible alloy steel backing, producing a blade that resists breakage under lateral stress while maintaining edge hardness through demanding cuts. At 24 TPI, these blades are suited for cutting thin-wall tubing, conduit, pipe, and sheet metal where a finer tooth pitch reduces burring and produces a cleaner kerf. The pack quantity of 100 makes this a practical stock item for shops, service vans, and tool cribs that cycle through blades regularly.
These blades are used across multiple trades. Electricians reach for 24 TPI blades when cutting EMT or rigid conduit. Plumbers use them on copper, CPVC, and light-wall steel pipe. HVAC technicians cut sheet metal, threaded rod, and small-diameter tubing during equipment installations and service calls. The 12-inch length fits standard full-size hacksaw frames. The 100-unit count supports ongoing field and shop use without frequent reordering.
Designed to fit standard full-size hacksaw frames that accept 12-inch blades. No specific compatible frame models were stated in the product data.
Install the blade with the teeth pointing forward, away from the handle, so cutting occurs on the push stroke. Tension the blade firmly in the frame before cutting to prevent flex and wandering. Always wear cut-resistant gloves and eye protection when changing or using hacksaw blades. Dispose of spent blades in a puncture-resistant sharps container to prevent injury.
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