Mount drill chucks into ER collet chucks, milling extension sleeves, and cylindrical toolholders with industrial-grade Straight Shank Arbors (straight shank drill chuck adapters). Designed to bridge keyless or keyed drill chucks with cylindrical clamping systems, these precision adapters feature a ground straight shank on one end and a standard drill chuck taper (B-taper / Jacobs taper) on the other. Precision-machined from high-tensile hardened alloy steel, they provide rigid mounting, high concentricity, and low runout across CNC lathe turrets, milling centers, and automatic drilling machines.