Some spider silks are really strong, but not all of them are. The ones that are really strong can actually rival steel and approach the tensile strength of Kevlar. Thus far, the dragline silk seems to be the strongest.

Some spider silks are really strong, but not all of them are. The ones that are really strong can actually rival steel and approach the tensile strength of Kevlar. Thus far, the dragline silk seems to be the strongest.