Hammpack injectors are perfectly matched to the injection holes, no matter if the drill is new or not, they always fit perfectly. The clinging compound even bites into the structure.

Increased effectiveness of anchoring the packer in the hole, by adjusting the diameters and bulges on the top of the strut rubber, this facilitates adhesion and proper anchoring (this allows for significant acceleration of packer installation, and increased tightness)

Increased strength and repeatability of the strut rubber, by adjusting the rubber mixture and the cooling process (by controlling the temperature), makes the injector resistant to rubber tearing and rubber falling out of the pads.