Conventional hasps have a hinged metal plate with a slot or opening that fits over a fixed staple. The shackle of a padlock fits through the staple to lock. The hinged plate and the staple are typically mounted to surfaces using screws.

Concealed hasps have hidden pins and mounting screws, making them more tamper-resistant than conventional hasps to deter theft and intruders.

Double-hinged hasps have extra metal plates and two hinges to enable use around corners or angles. They can also be used to secure doors and gates that are not flush when closed.

Locking hasps have a hinged plate with an opening that fits over a built-in lock, rather than a staple, eliminating the need for a padlock.

Weld-on hasps have a hinged metal plate with a slot or opening that fits over a fixed staple. The shackle of a padlock fits through the staple to lock. The hinged plate and the staple are permanently welded onto surfaces.