Description This item is well made of premium material for and practical use. With and precise design, the shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, and simplifies the debugging difficulty. Features - Color: Blue. - Size: 2.70X1.50X1.50cm/1.06X0.59X0.59 inch. - Material: Aluminum alloy. - Widely used in blowers,3D printer, ,CNC machine,stepper motors,etc. - Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and assemblies. - Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling. - Rigid coupling,high torque with rigidity,low inertia and excellent sensitivity. - No rotation gap, elastic action can make up for symmetrical angular misalignment. Widely used in blowers,3D printer, ,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and assemblies. Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling. Rigid coupling,high torque with rigidity,low inertia and excellent sensitivity. No rotation gap, elastic action can make up for symmetrical angular misalignment.