PET-U Woodworking Lathe Chuck 3-1/4 Inch with 1 x 8 Pre-Thread, Large Dedicated Pen Blank Drilling Lathe Chuck Set

Cast Iron Diameter: The diameter of lathe chuck is 3.25 Range: Drill from 1/4 to 1.5 using the standard jaw position, reverse the jaws to drill from 1.5 to 2.5 Jaws: Reversible jaws on the chuck will ensure that the blank reaches 2.5 squared x 5 long Compatibility: With 1 x 8 threads compatible with most wood lathes on the market