The drywall anchors are designed to prevent any damage to the walls. This is the best way to install these shelves without any damage at all.
No, you don't use drywall anchors if you can use a stud.
Drywall anchors should be placed no more than 16" apart. On a 20 foot wall you should place approximately 15 drywall anchors.
You cannot just hang LED TVs on the wall with screws alone. The screws will pull out of the drywall and the television will fall to the ground. To keep this from happening, you need to use wall anchors instead. These are made of plastic, and you can put them into the drywall. You can then put the screws into the anchors. This will make sure that the weight of the television does not cause it to fall.
Drywall anchors are small devices used to hold heavier items you plan on placing upon walls, especially if you don't plan on using the studs. You typically drill a hole where you plan to mount whatever it is you're mounting, screw the drywall anchor in, and then place the screw inside the anchor. The drywall anchor will hold tight to the wall so things don't fall or ruin your wall.
There are a number of websites that offer instruction videos on taping drywall. These can be found on YouTube, Home Depot, Popular Mechanics, DIY Network and HGTV.
If you are attaching it to drywall, use plastic anchors with the screws. The anchor expands while the screw is being installed and helps hold the fixture firmer to the wall. If the fixture is kind of heavy, use a "butterfly" anchor (the hardware store clerk will know what you want). Butterfly anchors open up like a butterfly's wings behind the wall as you insert the screw.
Screw anchors are used when a thin screw won't get sufficient support from the surface it's screwed into. - Drywall, for instance will not generally support thin load bearing screws, so this is a typical case where you would use screw anchors.
It depends on the application. Toggler makes SnapToggle bolts that hold up to several hundred pounds per anchor, provided there is a big-enough space behind the drywall to install them. These are about the most durable and highest test load you can find. Other anchors (Toggler SnapSkru and others) will hold a bit less but don't require as large of a channel behind the wall.
Watch the YouTube videos on how other new anchors and those of reality show do to get a clue of what to do on the anchoring farewell.
Two styles of anchors are heavy and light anchors. Types of anchors are as follows: Danforth anchors, plow anchors, spade anchors, Delta anchors, claw anchors, mushroom anchors, and navy anchors.
The instructions in the box are usually decent. Just use plastic anchors for the track screws in vertical drywall surface. IF IT"S OVERHEAD mount-use the anchors that spring open once they go thru the hole for safety. Lights pretty much slide on the rail.
Extremely easy. All you will need is a level, a drill, and some screws. If you are mounting to drywall make sure to use dry wall anchors.