Description: High quality metal and stainless steel material to ensure sturdiness & durability. Heavy-duty and rust resistant.Ideal for wood beams and varieties of supporting structures. Can be used to build a frame, serve as a corner connected, like fastening chair, wooden table, wooden bed, windows, shelf, furniture,etc. Powerful right angle design,double-wide corner brace for added reinforcement,right angle corner fastener to make frame stay firm. 8 size options for you to meet your needs, 20 pack/set is cost-effective. Specification: Material: Meatal Color: As Picture Shows Size Options 28 x 28 x 37mm / 11.02 x 11.02 x 14.57inch 70 x 70 x 18mm / 27.56 x 27.56 x 7.09inch 50 x 50 x 20mm / 19.68 x 19.68 x 7.87inch 40 x 40 x 16mm / 15.75 x 15.75 x 6.30inch 30 x 60 x 1.5mm / 11.81 x 23.62 x 0.59inch 30 x 30 x 29mm / 11.81 x 11.81 x 50.78inch 60 x 60 x 12mm / 23.62 x 23.62 x 4.72inch 78 x 78 x 16mm / 30.70 x 30.70 x 6.30inch Package Includes: 20pack Metal Angle Code Note: Please allow the slight size difference due to the manual measurement.