It is a very convenient and practical product. Easily install Turn off the light fixture, remove existing bulb, and simply screw the adapter securely .If you have no indoor socket, it would be solved your indoor lighting problem, like use in workshops, garages, and utility rooms. Features - Color: Assorted color. - Material: PBT. - Size: 4.30 x 2.70 x 2.50cm/ 1.69 x 1.06 x 0.98 inch. - Rated : 0~ . - Rated current: 3A. - Heat-resistant temperature: 165 degree centigrade. - to convert a patio light to a plug so that we could string lights across our patio roof and control them with the light . - These worked out great for plugging outdoor Christmas lights into our porch lights so we could cut them off and on with the indoor wall . - Professional and practical design with beautiful appearance, easy to carry and use. - Insulation heat resistant, durable and . - Made of materials, wear resistant and firm, durable and . Package list: 10 x lamp holders