Power Outlets & Sockets descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Adjustable 86 Switch Socket Box, Mounting Cassette Screw Set. Feature: 50mm Deep Made of Fire Retardant Durable PVC Plastic, Can Easily Be Fastened Together, Forming a Unit of 2, 3, Etc. Offices, Thanks to the Fact That Square, There is More Free Space for Wires. Suitable for Both Chinese (square Back) and European (round Back) Electrical Installations (sockets, Switches, Dimmers, Etc.). Brass Screw Thread Housed in Plastic Posts The Nut Can Be Adjusted on the Line According to the Actual Situation to Prevent the Screw from Sliding out Single Side Double Screw Hole Design Can Prevent Screw Holes from Being Damaged Due to Incorrect Operation,Cannot Use Back Box.(Note That if Single Side Double Screw Hole Are Damaged, You Cannot Use Dark Box. 11 Cable In/out Points.Convenient for You to Wire from All Directions, No Need to Pay Extra to Buy Other Equipment or Damage the Back Box Approved for Reliability & Safety The Same Product Can Be Spliced Screw Length is 2.5cm Socket Mounting Screw Specifications: Plug Type: Universal Style: Wall Embeded Surface Treatment: Semi-gloss Size:: 83mm*81mm*50mm Deep:: 50mm Style: 86 Material: PVC Whether Flame Retardant: Y . Products number : SOMONO157062