Comprises of a frame designed for screw jack operation, one each of the adaptor plates and plunger adaptors for 38mm, 75mm, diameter, 100mm diameter, 150mm diameter, specimens and a stand to obtain simultaneously three 38mm diameter samples from one 100mm diameter sample. The adaptor plate which slides a long the slotted supports can be clamped at any desired position by means of locking nuts. Beside this, the tube or mould can be held in position by raising the tube guides and held in position with locking screws. the lead screw movement can be stopped at any predetermined position by tightening the lead screw locking collar. Plunger adaptor for 200mm dia samples. Adaptor plate with 200mm dia hole and device to extract 3 number 38mm dia samples.