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Widely used: this tool is suitable for a variety of power drills, milling machines, lathes, rotary lathes and electric hand tools Keyless Design This tool uses the keyless design, which is more convenient and faster. Practical design of the surface convex and concave, so that before and after the set, the shaking jacket can be effectively managed and reduced High Quality This tool is made of No.45 steel with good metal structure and smooth surface. This tool contains no harmful coatings, non-toxic and tasteless. You can use it safely Size:Chuck Outer Diameter 48mm/1.89\; Product description Functions: Made of 45 # steel, solid and durable. Good metal structure, comfortable surface, easy to clamp, so that the output torsion becomes larger. Beautiful and practical design of the surface convex and concave, so that before and after the set, the shaking jacket can be effectively handled and reduced. The keyless design, tightening and loosening is done by hand, which allows faster and easier clamping and unclamping. Widely used in various drills. machinmachinmachinmachinmachinmachinmachinlathes, lathes, lathes and electric hand tools. Specifications: Material: 45# steel. Accuracy: 0.002 Chuck capacity: 0-16 mm. Chuck outer diameter 48mm Chuck length: 99 mm. Spike type: M3-B18. Pin length: approx. 138 mm. Total length: approx. 210 mm. Weight: approx. 1333 g. Package includes: 1 x keyless drill chuck. 1 x M3-B18 arbor. Note: 1. Only things package included, no other things. 2. Please allow 1-2 mm error due to manual measurement. Thank you for your understanding.; Product description Functions: Made of 45 # steel, solid and durable. Good metal structure, comfortable surface, easy to clamp, so that the output torsion becomes larger. Beautiful and practical design of the surface convex and concave, so that before and after the set, the shaking jacket can be effectively handled and reduced. The keyless design, tightening and loosening is done by hand, which allows faster and easier clamping and unclamping. Widely used in various drills. machinmachinmachinmachinmachinmachinmachinlathes, lathes, lathes and electric hand tools. Specifications: Material: 45# steel. Accuracy: 0.002 Chuck capacity: 0-16 mm. Chuck outer diameter 48mm Chuck length: 99 mm. Spike type: M3-B18. Pin length: approx. 138 mm. Total length: approx. 210 mm. Weight: approx. 1333 g. Package includes: 1 x keyless drill chuck. 1 x M3-B18 arbor. Note: 1. Only things package included, no other things. 2. Please allow 1-2 mm error due to manual measurement. Thank you for your understanding.; Functions: Made of 45 # steel, solid and durable. Good metal structure, comfortable surface, easy to clamp, so that the output torsion becomes larger. Beautiful and practical design of the surface convex and concave, so that before and after the set, the shaking jacket can be effectively handled and reduced. The keyless design, tightening and loosening is done by hand, which allows faster and easier clamping and unclamping. Widely used in various drills. machinmachinmachinmachinmachinmachinmachinlathes, lathes, lathes and electric hand tools. Specifications: Material: 45# steel. Accuracy: 0.002 Chuck capacity: 0-16 mm. Chuck outer diameter 48mm Chuck length: 99 mm. Spike type: M3-B18. Pin length: approx. 138 mm. Total length: approx. 210 mm. Weight: approx. 1333 g. Package includes: 1 x keyless drill chuck. 1 x M3-B18 arbor. Note: 1. Only things package included, no other things. 2. Please allow 1-2 mm error due to manual measurement. Thank you for your understanding.