Consists of four stainless steel plates as above fitted in a fixture having a rigid base plate and are guided on a pair of vertical rods. The spacers are also guided on the same rods and are provided with springs to increase space between the plates for inserting the specimens. The specimens are compressed with the help of a screw rotated by a handwheel. The whole arrangement enables quick application of compression load on the specimen.compact size can be placed inside an oven for conducting tests at elevated temperature.