Au Sable Speed Crank: If you are winding a lot of thread/material around the hook shank, this attachment with a 2:1 gear ratio can cut your tying time in half. A 2.5:1 and 2.8:1 gear ratio available. Will work on the Master & Presentations 3000 & 4000 Series Picture showing the Ausable Speed Crank on a Presentation 4000. Vise not included.