Turkey Lacers are thin needles about 4 1/2 inches (11 cm) long that are pointy at one end with a large eye at the other end.
They are used in combination with thin butcher string to close and hold shut the neck cavity of poultry that has been stuffed. The purpose is to keep all the stuffing inside the bird, by preventing it from falling out, and also to keep the stuffing moist, by avoiding a wide, exposed surface of the stuffing that would go brown and crispy.
Turkey Lacers are very inexpensive. They are usually sold in packs of 6, 8 or 10. Most packs include enough butcher string for your first time out. The butcher string acts as the actual "lace", as it were.
Some lacers are sold in tubes, which can be used to store them. If not, place them all in a small plastic sealable bag and store them like that. That will prevent them from wandering off one by one into cracks of drawers, as they have a tendency to.
Though they're called "Turkey Lacers", they can be used with other birds as well (such as chicken, capon, pheasant, etc.) Consequently, they're sometimes referred to as "poultry lacers."
How to use turkey lacers
Some people recommend placing a piece of a heel of bread on top the exposed dressing in the neck cavity before beginning, so that your stuffing gets completely protected from the dry air in the oven.
Insert the turkey lacer needles at various strategic places around the cavity, leaving the eye ends out. Then, thread a piece of thin butcher's string through the eyes. Then, pull the string tight to draw the needles all together, closing the cavity.
When the poultry is cooked and has had a short resting time, you pull the needles out and then get on with serving the bird and the stuffing.
If you stand the used lacers immediately in a glass of water to soak, it will make wash-up of them easier at the end of the meal. Discard the used butcher string in compost.
Most people recommend washing turkey lacers by hand, and it's probably best to do that: not because they're expensive to replace, but because they do tend to get tossed around inside the dishwasher, and end up on the bottom in hard to get to nooks and crannies that will have you afterwards cursing on your knees with your head stuck in the dishwasher trying to find them.