SKU VIMSHM403
3 mm hex, 1-piece driver bit, 1/4 in. square drive. Made of S2 alloy steel, the strongest, hardest drivers available. Heat treated to 56-62 RC. Features and benefits: S2 alloy steel, the strongest, hardest drivers available, heat treated 56 62 Rc, stubby one piece driver design, satin chrome plated, knurled body for finger control