Made of CRV for strength and durability. Heat treated for hardness more than HRC52. SAE size: 1/16”, 5/64”, 3/32”, 1/8”, 5/32”, 3/16”, 1/4”. METRIC size: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm.
This hex set from a certain brand in Industrial and Scientific CATEGORY falls short in quality. Thanks to my knowledge gained in practice, i can say that the folding mechanism seems flimsy and the actual tools bend easily .While the black finish looks sleek it scratch and chips off easily..