Uxcell a15082600ux0833 1/4" Shank Adapter to 3/8 Inch 24UNF Thread with Reverse Screw grey Total Weight: 113g; Product Name: Drill Chuck Adapter Package Content: 6 x Drill Chuck Adapter; Overall Size: 46 x 14mm/ 1 7/8" x 0.55" (L*D) Material: Metal; Shaft Diameter: 6.3mm/ 1/4" Color: Gray; Thread Diameter: 3/8" Pitch: 24G; Phillips Screw Diameter: 5mm/ 0.2"