Professional Strength Cable Tie Bases These high-strength bases have long-term durability and feature an added screw-hold for even more strength. Your next project is sure to go easier with Nova Supply's premium adhesive-backed cable-tie mounts! Can the be inserted on all four sides? Absolutely! Makes installation a breeze. How many come in a pack? A total of 00 cable tie mounts come in each package. Installation Guidelines These work best when installed on a clean, flat and, dry surface. Simply peel off the backing paper and apply firmly to the surface. For maximum strength, use a screw in the center. 0-Day Free Returns & Satisfaction Guaranteed! If you aren't completely satisfied with your order, simply reach out to us through the Amazon messaging service and we will respond within 4 hours to make it right even on the weekends. We absolutely guarantee your satisfaction or your money back!