BBR [India] Pvt. Ltd. Manufactures Concrete Test Hammer with Compressive Strength. BBR [India] Pvt. Ltd. Is an ISO 9001:2000 certified company. Concrete Test Hammer with Compressive Strength is used for the non-destructive measurement of the concrete/mortar compressive strength and the control of the uniform concrete quality [in-situ concrete and prefabricated structures]. Concrete Test Hammer with Compressive Strength is also applicable for detecting weak spots. The compressive strength [fc] of this hammer is established by measuring the hardness [rebound value R] of the concrete surface and with the conversion curves. It is available under the brand name of ORIGINAL SCHMIDT®.