The forearm reinforcement is made of high-density steel, which is durable and not easy to break, the metal look is more textured and advanced than shiny, and the extended handle is suitable for most people. The high-density sealant filler is extracted by advanced technology, and it is fastened without falling off. The handle is made of high-quality aluminum alloy, and the surface is treated with a diamond-shaped anti-skid pattern, which is non-slip and durable. The bottom adopts the laser engraving process, and the handwriting is clear, which is convenient for the reasonable use of the grip strength trainer.