2 31/32X1/4 Magnetic C Ring Hex Insert Bit Holder (Pack Qty 10) BC-40-942

Shank: 50BV30 steel (similar to SAE 6150). Body: #704 or 707 Stainless steelYou may also like 2X1X1/4 Square Recess Insert Bit (Pack Qty 200) BC-29-050.