These Zip Ties are use to mount your Hydraulic Brake Lines to your trailers frame. With these Zip Ties, you pre-drilled a small hole slightly smaller than the diameter of the threads of punch in section of the Brake Tie. The slotted end of the Zip Then inserts into the drilled hole. You then secure the Brake Hose using the same action of a traditional zip tie. These Brake Line zip ties are ideal for usage in all environments. They will not rust and are easy to replace and secure into position. This is a Pack of (10) Zip Ties to mount your trailers disc brake lines to any type of frame material. These will work on steel, galvanized,and aluminum trailer frames. Using this type of tie, rather than steel screwed in brackets will eliminate the amount of rusted components on your trailer.