Brand Name: Forney *Diameter: 1/2 in. *Useable Length: 1 in. *Product Type: Rotary File *Shape: Conical with Round End *Number in Package: 1 pc *Shank Diameter: 1/4 in. *Material: Tempered Steel *Overall Length: 2.25 in. *Maximum Speed: 2500 rpm *Packaging Type: Carded *Cut Type: Bastard Cut