The #28 Check Reamer from Field Tool Supply is crafted from high-speed steel (HSS) for superior performance in reaming applications. This straight flute reamer is designed for precision work in stainless steel and other tough materials, featuring a 1/4-inch diameter. The HSS construction ensures durability and resistance to wear, while the straight flute design allows for efficient chip removal. Ideal for creating smooth, accurate holes, this reamer is compatible with various drilling machines and is perfect for both industrial and DIY projects, delivering exceptional results every time.