Erector T-Bar connector

thingiverse

The Erector Building Set consists of 500 distinct pieces. Included are metal rods made from steel and axles to build elaborate structures as desired by engineers-in-training at home. There is a vast range of construction ideas featured with every single model that makes your creations entirely limitless. A set like this one is sure to provide hours and hours of enjoyment, especially for young men, when constructed precisely as the designer intended. The Erector Construction Set includes several wooden girders made of actual hardwood along with gears. This kit has more components than almost any other construction toy sold today at your neighborhood five-and-dime store!