Pins are unthreaded fasteners inserted through pre-drilled holes to secure or fasten objects together. Pins come in different shapes and designs, each serving specific functions in various applications.

Cotter Pins are bent metal pins with a split at one end. they are commonly used to secure bolts and other fasteners by passing the pin through a hole in the fastener and then spreading the ends to prevent it from coming out.

Dowel Pins are cylindrical rods used to align and join two or more components precisely. They fit into corresponding holes in the parts, ensuring proper alignment during assembly.

Roll Pins are hollow cylindrical pins that compress when inserted into a hole. They are often used to secure two parts together by fitting into a drilled hole and expanding to create a tight fit.