Thank you for your inquiry regarding this item from Prime-Line Products. For crimping cable ferrules to cable:
1. Loosen clamping bolts. Locate bolts on either side of desired cable size.
2. Insert ferrule in selected cable size and hand tighten.
3. Feed cable through ferrule, looping it back through the tool. Allow at least 1/2 in. excess cable to protrude past ferrule to secure firmly.
4. Tighten crimping bolt with wrench until fully seated.
Note: This product is designed for residential and light commercial crimping. Not to be used where excessive tension or pull will be applied.
For additional questions regarding this item, or any other product manufactured by Prime-Line Products, please call their toll free number at (877) 649-9740, or contact them by email at firstname.lastname@example.org