The Phidgets Jaw Coupling Half 5mm Series 12 is an aluminum coupling designed to connect a 5mm shaft to another shaft using a spider. This coupling is suitable for high-torque applications and can accommodate shafts of varying sizes. It is secured with two set screws and is compatible with other Series 12 jaw couplings. The coupling is engineered to handle torques up to 35 kg·cm and speeds reaching 12000 rpm. Note: Ensure proper installation to prevent mechanical failure.