I am selling this item because I no longer have a use for it. Features: ● The lid can be removed simply by loosening the screws. ● Knockouts can be opened with a screwdriver. Specifications: ● Manufacturer: Mirai Kogyo ● Model Number: 8CB82NM, 20 pieces ● Product Name: Octagonal Concrete Box ● Standard (Cover Plate): Round ● Knockouts: - Side Knockouts: 22(25) x 6, 16(19) x 2 - Top Knockouts: 22(25) x 2, 16(19) x 1 ● Material: High-impact resistant resin (HI) ● Body Color: Gray ● Inserts can be attached. ● Compatible with cover plates (one-touch type). Thank you for your interest.