Precision system is a system which connects a removable partial denture to fixed bridgework or to the natural teeth. They are the functional parts of removable partial denture. They are positioned such that they are parallel to each other. Precision attachment is defined as an interlocking device, one component of which is fixed to an abutment or abutments and the other is integrated into a removable prosthesis to stabilize and or retain it according to GPT. Precision attachments are the functional mechanical parts of the removable partial denture made of plastic, metal or a combination of both. They consist of two parts referred as the ‘male’ part that is fixed to a crown inside the patient’s mouth and a ‘female’ part which holds the partial denture.