Click or scroll to zoom Tap or pinch to zoom Calvan Alstart 439 9-Piece 3/8" & 1/2" Drive Stripped Bit Socket Set - Metric In Stock $57.96 SKU CV439 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Used for removing rounded or stripped fasteners with internal drive heads. Can be used on new screws as well. Reverse twist in the hex key bites into stripped out hex for easy removal. Full range to remove most common sizes. 3/8" drive: 4mm, 5mm, 6mm and 7mm 1/2" drive: 8mm, 10mm, 12mm, 14mm and 17mm.