Feature: The product is made of high-quality metal and has high hardness. It is suitable for long-term use and will not affect the accuracy of the work. Extended straight shank type handle with a longer handle body. Suitable for deep hole processing to meet extended depth requirements. Helps reduce the use of extended cutting tools, lowers processing costs, and increases efficiency. Various details of the product are carefully designed to ensure stability and accuracy. The extension rod diameter and other parts are precision ground to eliminate imbalance and enhance cutting safety. Specification: Model: C16-ER11-35L Nut: ER11A Fuselage length: 40mm (including nuts) Body length: 35mm Shaft hole: 5mm; 6mm; 8mm (Optional) Model | Total length (include nut) | Body length | Pilot hole | External diameter of rod | External diameter of hex nut C16-ER11-35L-5mm | 40 | 35 | 4.98 | 16 | 19 C16-ER11-35L-6mm | 40 | 35 | 5.98 | 16 | 19 C16-ER11-35L-8mm | 40 | 35 | 7.98 | 16 | 19 Package list: 1 * Chuck Holder Note: The actual product color may differ slightly from the photo due to lighting conditions. There may be a slight measurement deviation.