Taper Shank: High Precision BST Sharp Hole Combination Tool Handle, Heat Treatment Hardness: HRC50-52

Material: 42CrMo

Body Precision: 0.003mm
Product Advantages: Vacuum heat treatment, uniform quenching for high hardness, and good shock resistance. The taper shank conforms to AT3 standard, all tested with precision on Germany’s DIEBOLD standard gauges, ensuring accurate and stable positioning.