It ultimately depends on personal preference and what you would use more often. If you find yourself needing a pen frequently, then a pen would be the more practical choice. However, if you are someone who frequently loses or misplaces keys, then a keychain might be the more useful option. Both items can be functional and stylish accessories, so it's really a matter of what you would get the most use out of. **

Your pliers may be squeaking due to a lack of lubrication on the pivot point or hinge. Over time, dirt and debris can build up in these areas, causing friction and resulting in the squeaking sound. Applying a small amount of lubricant, such as oil or grease, to the pivot point can help reduce the squeaking and improve the overall performance of your pliers. If the squeaking persists after lubrication, there may be a more serious issue with the pliers that requires professional inspection and repair. **

A piercing pliers is a specialized tool used in body piercing to hold and stabilize the skin during the piercing process. It typically has a clamp-like design with a sharp, pointed end that is used to create a hole in the skin for the jewelry to be inserted. Piercing pliers help piercers maintain control and precision while performing the piercing, ensuring a clean and accurate result. **

Without further information or context, it is difficult to determine if the keychain is broken. If you can provide more details about the issue with the keychain, such as a description of the damage or malfunction, I would be happy to help assess the situation. **

It is generally not allowed to bring multitools in carry-on luggage on commercial flights due to their sharp edges and potential to be used as a weapon. However, you may be able to pack it in your checked luggage instead. It is always best to check with the specific airline you are flying with and review the Transportation Security Administration (TSA) guidelines to ensure compliance with their regulations. **

Certainly! I will locate the pliers for you. Where do you think they might be located? **

Certainly! I will retrieve the pliers for you. Where are they located? **

A pair of pliers is a hand tool used for gripping, bending, and cutting various materials. It typically consists of two hinged arms with serrated jaws at one end and handles at the other. Pliers come in various types, such as needle-nose, slip-joint, and cutting pliers, each designed for specific tasks. They are commonly used in construction, electrical work, and automotive repair. **