Hi Shaun,

The vise has served us well for the better part of 12 years. Yes, it is made of delrin (high test plastic to some people) which is a product originally developed for roller bearings in factory conveyor belts; it's really tough stuff but it is possible to break it if you try hard enough. The jaws are the strong point and also the weak point as some tiers have discovered. The mechanical engineer who developed the jaw/cam unit really hated to have his hooks slip in the jaws (his name is Thorkild Damm from Denmark) so he engineered the cam to apply a jaw closing ratio of 10 to 1. Most American made cam vises work on a 2.5 or 3.0 to 1 ratio. SO, it is real easy to over stress the jaws (or hook) if the tier doesn't follow the adjustment instructions we send on a DVD with the vise. If you happen to purchase a Danvise from an Orvis dealer you won't receive the DVD instruction but can find the same video files on our home page on the right hand side under "Danvise Central." Watch the video if you want to learn more about the vise before making a purchase decision. Take care & ...

Tight Lines - Gretchen & Al Beatty
www.btsflyfishing.com