Comments: Some grill manufacturers have been developing better grill/rack/rock/briquette/spatter systems for a number of years. But if you have a charcoal grill or a low- to mid-range gas grill, flare ups, charring, burning., etc. can be a big problem. GrillGrates were developed to solve those problems.
The interlocking grates are meant to block flare-ups; produce perfect sear marks; keep meats, fish, and vegetables from drying out; produce evenly cooked pizzas; and keep small pieces of food from dropping through to the coals/rocks below. The basic package comes with two interlocking grill grates and a HUGE fork/spatula that lets you slip the tines between the rails of the grates, making it easy to turn or remove foods.
We tried a favorite chicken thigh recipe that invariably causes such flare-ups that we now put the chicken on the side of the grill with no heat and essentially bake it for a long time in a closed grill. Putting our chicken over the heat using the GrillGrates almost eliminated the flare-ups.
You can heat the anodized grates to 1000°F (540°C) and use a grill brush or scouring pad to clean the rails. The non-stick version must be treated with more care – don't go above 600°F (315°C) and clean the rails with water and a paper towel.
If you want to cover the entire surface of your grill, investing in as many three extra grill sections will begin to add up (the basic two-section package and one extra section covers 90% of the Weber kettle grill). Storing the fork is going to be an issue for some people, but it does work well in allowing you to scoop up a lot of food at once.