The Klein 1232BI-P bi-metal blade has special high-speed steel teeth that are fused to regular a carbon-steel body to provide superior cutting and a longer life. It withstands greater saw tension for less blade flexing. It fits all 12-Inch hacksaw blades. The Klein 1232BI-P bi-metal blade has special high-speed steel teeth that are fused to regular a carbon-steel body to provide superior cutting and a longer life. It withstands greater saw tension for less blade flexing. It fits all 12-Inch hacksaw blades. Cuts wood, plastic and most metals Weight: 7.2 ounces/pack The Klein 1232BI-P bi-metal blade has special high-speed steel teeth that are fused to regular a carbon-steel body to provide superior cutting and a longer life. It withstands greater saw tension for less blade flexing. It fits all 12-Inch hacksaw blades.