Non-rotating rubber ribbed stabilizers are ideal for centralizing drill pipe inside casing when milling is required on fishing jobs. The rubber sleeves ensure that there will be no wear inside casing. These are designed to perform better in hard and abrasive formations. The fully rubber sleeve design provides excellent wall contact and offers better mud circulation and freedom from balling. The fully assembled stabilizer has four main parts: main body, top sub, replacement wear ring and the sleeve.