Legrand - On-Q WP3456WH Single Speaker Keystone Insert, White On Q KEYSTONE JACK: On q keystone jack is mainly designed to cover unused ports until needed. Designed with durable plastic construction. SPEAKER CONNECTIONS: Speaker outlet includes screw-down clamps for up to 12-gauge speaker wire. QUALITY: High quality keystone insert is for use in all multimedia wall plates. DIMENSIONS: On q keystone jack with dimensions Depth : 1.21" Length : 0.87" Width : 0.67 in BEST SELLER Outlet Covers: On-Q provides the proven, practical solutions preferred by installers and home builders across the country. The comprehensive product offering, which includes wall plates, jacks, connectors, straps, tools, modules and enclosures.