These Shelf Support Pegs by Prime-Line Products are constructed from heavy-duty plastic and come in an almond color. These types of shelf support pegs are commonly used in bookcases, stereo and storage cabinets to support adjustable glass and wood shelving at up to 25 lbs. per support peg. These shelf support pegs feature a 1/4 in. peg diameter and they are easy to install. Use pliers to remove any stubborn/stuck pegs. Avoid using levels where hole's diameter has been widened.