VELCRO® Brand ALFA-LOK® Fasteners pack super strong holding power into mere inches of hook to hook engagement. Holds 2 lbs per square inch up to 15 lbs. VELCRO® Brand ALFA-LOK® Fasteners omnidirectional hook to hook fastener works like a charm even in extreme conditions. And because they are omnidirectional, you can easily mount cameras, lights, sensors, and solar-powered accessories indoors or out. No tools required. On a broad range of surfaces. Apply to a clean, dry surface, allow the adhesive to set and snap, you’re done. ALFA-LOK® Fasteners are strong enough for outdoor, vertical applications even in extreme temperatures. They will hold fast through rain, snow and sweltering heat while supporting up to 2.5 pounds per square inch, not to exceed 15 pounds. The snap tells you it’s securely fastened. Available in squares and strips, ALFA-LOK® Fasteners will become the most sought after item in your tool kit.