The Minnesota Trapline Coil Spring Trap sports a robust design and heavy-duty materials for years of use. Features like double-swiveled machine chain, ultra strong spring-steel springs, double-posted pan, rounded jaws, heavy base, and adjustable pan tension make the Spring Trap one of the most effective and economical traps on the market. Heavy-duty materials for years of use Ultrastrong spring-steel springs Heavy bases with adjustable pan tension