Blue steel engineers offers the digital hardness tester [durometer] which used for the determination of the indentation hardness of rubber, plastic, leather, wood and other similar materials. The force is applied by a specially designed spring hold in a load cell screwed on to the body of the tester. The load cell can thus be easily transfered in case of waer and tear after a long use. To remove errors received from various contact pressures applied by the operators, these testers have further been included with very special springs contained in the outer body giving a specified contact pressure remains constant as per international specifications irrespective of the operator`s hand pressure-resulting in very accurate readings. These machines are highly portable. The digital display provides readings up to 0.5 shore units and misreading of the scale is avoided.