ITEM NAME:10mm 3/8'' 24UNF Keyless Drill Chuck Converter & 1/4'' Hex Shank Adaptor T ax3C Description 100% brand new and high quality Strong and sturdy, Professional Quality. Product name: Hex Shank Adapter Material: Metal Color: Black Size: Approx. 83x6x8mm/3.26"x0.23"x0.31" Thread diameter: Approx. 6mm/0.23" Chuck range: Approx. 0.8-10mm/0.031"x0.39" Package Include:.1x Hex Shank Adapter. Chuck range: Approx. 0.8-10mm/0.031"x0.39".