Command 3M 12ct Pack Picture & Frame Hanging Strips Sets Medium Size White Damage-Free Heavy duty medium interlocking fastener strip sets; Hangers will stick to painted, stained or varnished wood, cinder block, plaster, metal, painted wallboard 1 fastener set = 2 strips: 1 for frame, 1 for wall; Easy to apply, holds pictures & frames strongly; Damage-Free hanging - removes cleanly w/no residue; Without nails; No excessive hardware, tools, wire needed. Great for collages, artwork, craft projects, hanging dry erase boards, lightweight clocks and mirrors, office decor Fasteners lock w/no tools, stronger than Velcro; See photos for strip weight & frame size capacity. Removable and repositionable makes these great for redecorating. White, 3M quality, Great for collages; Made in the USA, Each strip 2"L x .75"W (12) Sets Of 3M Medium Command Hanging Strips Kit (2 Packs Of 6), Model 17204ES, White, New In Retail Packaging