This precision broach tool is crafted from high-grade stainless tool steel, hardened and tempered to HRC 58 for outstanding strength and long service life. Designed for broaching and squaring tang holes in handle blocks, it's available in 2 mm, 3 mm, 4 mm, 5 mm, and 6 mm sizes. Each broach is made slightly thicker so you can grind or modify it to your exact thickness requirements, ensuring a perfect fit for your project.