Tired of manually rolling ICs on a desktop to align the pins for a socket? Here is your easy solution! There are four sets of STL included. Both multi part and single print STLs are included for 40 pin and 20 pin tools. The left and right side parts are identical for both the tools. The single print STLs work but clearing out the supports is a challenge. The five part solution is easy to assemble and moves very freely.