4 Pack shelf support pegs. Constructed of plastic and come in a clear finish for increased concealment. They are designed to receive 1/2 in. thick shelves and can support a maximum of 5 lbs. each, per peg. The main feature of these shelf pegs is the self-locking tabs that secure the 1/2 in. thick shelves in place, preventing tipping and rotating of shelves. The 1/4 in. outside diameter pegs have a 5/16 in. depth and feature serrated stems for a stronger grip. * Adjustment Tip: To remove and relocate these support pegs, the tabs which lock in the shelves must be pushed in and held in while twisting the shelf upward in a clockwise direction if lifting the shelf from the left side. If shelf will be lifted upward starting from the right side, push and hold in the locking tabs of the support pegs (on the right) while twisting the shelf upward in a counter-clockwise direction from the right side. To accomplish this task a third or fourth hand may be required.