The #21 CHK REAMER SF SS HS from Field Tool Supply is a high-quality reaming tool designed for precision finishing. Made from stainless steel, this reamer offers excellent corrosion resistance and durability. The size #21 ensures compatibility with a variety of applications, making it versatile for both professional and DIY use. Its sharp cutting edges provide smooth finishes, while the high-speed steel construction ensures longevity. Ideal for use in metalworking and machining, this reamer is essential for achieving precise hole dimensions.