Projectpak window candles easily secure your flameless window candles to any window. You wont have to worry about your candle lamps falling over and breaking. They will no longer get knocked down by pets or children. You can use these with virtually any window candle (electric corded, timer, battery operated. Comes in 8 and 16 pack. Directions below: 1 Assemble to candle clamp to suction cup by inserting the center pin at the base of the clamp into the hole on the side of the suction cup. 2 Press firmly to insert your candle into the candle clamp. 3 Make sure window is clean, then press suction cup onto the window. To remove, lift the easy release tab on the suction cup. For best results, surface should be above 40 degrees Fahrenheit when applied. Made in USA!