20 pcs 4040 Corner Brackets & 10 pcs 2020 Corner Brackets2020 Corner Brackets:The corner brackets are used to connect pieces of 20mm aluminum extrusion at a 90 degree angleThe oval mounting holes is 9mm x 6mm/0.35 x 0.23 inch,please choose the suitable bolts and nuts,which are not includedSuitable for most of metric 20 Series Aluminum ExtrusionWidely used to reinforce right angle corner joints of doors, windows, furniture, etcthese corner brackets are durable and solid.Widely used to reinforce right angle corner joints of doors, windows, furniture, etc.There are total 10 pieces of brackets in one pack that you can use for many projects.Convenient to use, they can be simply fastened with bolts and nuts, bolts and nuts are not included.Bracket Size: 20mm x 20mm x 17mm / 0.78 inch x 0.78 x 0.67 inchHole Size: 9mm x 6mm / 0.35 inch x 0.23 inch4040 Corner Brackets:Main product: corner bracketColor: silverMaterial: aluminum alloy & Cast aluminumPackage Contents:20 x 4040 Corner Brackets10 x 2020 Corner BracketsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.