"HILLMAN" TOGGLE BOLT *Size: 1/8" x 4" *Drill size: 7/16" *Holds up to 50 lbs *Strong spring action opens wings after insertion through the wall *Wings lock into both threads when fastener is tightened this prevents loosening from vibration or shock *Use in all types of materials such as drywall, plaster, glass block, concrete or cinder block *Ideal for horizontal or vertical applications where other anchors would be difficult to set *Excellent anchor for use where thicknessof material is unknown or inconsistent *Steel zinc plated *Card of 2 *Discovery NBR, SUP