Description The mini chuck is made of high-quality metal material, wear-resistant and durable. The keyless mini chuck can hold tools with shank diameters from 0.3 to 3.4mm, such as drills, for drilling, polishing, and grinding. The keyless mini chuck is designed with a non-slip texture, and the mini chuck can be easily tightened by hand. The hole diameter of the brass connecting rod on the keyless mini chuck is different and can be installed on the motor shaft according to the corresponding diameter. The mini drill chuck is compatible with most rotary tools such as micro drills, grinders, etc. Can be easily tightened by hand. Product Description Feature: 1. Made of high-quality metal, wear-resistant and durable. 2. The chuck can hold tools such as drills with shank diameters of 0.3-3.4mm for drilling, polishing, grinding, etc. 3. The chuck has a non-slip texture, convenient to tighten by hand. 4. Brass connecting rods have different openings, which can be installed on the motor shaft with the corresponding diameter. 5. Compatible with most rotary tools, such as electric miniature drills, electric grinders, etc. Specification: Material: Brass + aluminum alloy Clamping range: 0.3-3.4mm Outer diameter: 10mm Installation hole diameter: 3.17mm Package weight: 25g (Approx.) Connecting rod 1 x Hex Packing list 1 x Hex: 1 x Hex—qudd