Irwin  Hanson  High Carbon Steel  TR-21  A *Sub Brand: Hanson *Material: High Carbon Steel *Diameter: TR-21 *Metric or SAE: SAE *Product Type: Adjustable Tap Handle & Reamer Wrench *Number in Package: 1 pc. *Packaging Type: Carded *Usage: Taps No. 0 to 1/2 in. *Straight handle design provides greater leverage, especially when using larger diameter taps* Designed for use with taps, reamers, screw extractors and other tools with a square shank