50 pack of strong, small white plastic gutter hooks are a simple way to fasten string lights and icicle lights on half round and box gutters up to 5mm in thickness and wiring up to 8mm in diameter.
These quality gutter hooks are "sub zero" and will hold in temperatures down to MINUS -40°C without becoming brittle. Some other manufacturers products turn brittle in very cold temperatures which can then break and block up drains.
It is recommended one gutter hook placed every 6 inches on light strings. A 50ct polybag pack will hold approx. 25 feet of lights. Each clip is 25mm (1 inch) in length. Made from 100% Polypropylene.