6X1/4 Magnetic C Ring Hex Insert Bit Holder (Pack Qty 6) BC-27-750

Shank: 50BV30 steel (similar to SAE 6150). Body: #704 or 707 Stainless steelYou may also like 7/16X2 9/16 Magnetic Hex Driver Power Nutsetter Insert Bit (Pack Qty 10) BC-38-639.