These handy Blind Holders are used by custom car builders to hold sheet metal parts before final welding. Very easy to use. Drill a 1/8″ hole through both pieces and insert fastener. Each one provides nearly 20 lbs. holding power and has a grip range of up to 1/4″. A side-grip fastener is included for edge work. For panels with flanged edges, use the C-Panel Holders (19076) (reach is 2″, opening is 3/4″). Imported.