<p>CNC Tool Holders, Mixed Types (Including drill chucks and collet holders), Taper Size: CAT40, Shank Diameter: 0.75 inches (19 mm), Overall Length: 6 inches (152 mm), Material: Steel, Weight: Approx. 2 pounds (0.9 kg) each, Compatible with CNC Milling Machines, Lot Quantity: Approx. 40-50 per Bin.</p>