uxcell 1/4-inch Hex Shank 3/8 Inch Thread Drill Chuck Adapter w Lock Screw Total Weight: 23g; Product Name: Drill Chuck Adapter Package Content: 1 x Drill Chuck Adapter, 1 x Case; Overall Size: 58 x 14mm/ 2.3 x 0.55" (L*D) Material: Metal; Color: Gray Thread Diameter: 9.4mm / 3/8"; Phillips Screw Diameter: 5mm/ 0.2" Hex Shank Width: 6.3mm/ 1/4"