I actually read and followed the directions once and didn't lose a limb or my face. In my opinion, independently working spring compressors are too schematic and a safer alternative. I went a step further and tied the spring tightly to the compressor with 3/8 inch chain and then also to the extremely heavy immobilized object so if something went sideways it wouldn't go far. a much cheaper version available from port charters which includes a security ring which is not included. I bought it before I found the HFT version, but if your life depends on it, you probably shouldn't be buying it at the port anyway. .
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