These zipper pulls offer some nice benefits over traditional plastic end tabs. Since a fancy visco-elastic molded rubber-like material it will not absorb fluids. Tensile strength is around 40lbs so plenty enough to stand up to normal use, but will break away if snagged during heavy movement rather than resulting in a bad day. Different sliders will offer different mounting options, however generally the Zipline is installed using simple half hitch or girth hitch knots. This particular ALPHA version offers a good grab size and the oval design creates a lot of contact space for a solid grip.