Semi-tubular rivets feature a partial hole at the tip of the shank, allowing for easy installation with less force than solid rivets. As the rivet is set, the material flows into the hole, forming a strong bond. The Countersunk Head provides a flush finish, improving aesthetic and strength. The Round Head enhances overall strength, while the Flat Head offers a large bearing surface for load distribution. The Oval Head combines strength with a unique shape, providing an effective and reliable fastening with optimal shear strength and durability in the connection.