A straight razor or a safety razor is commonly used for straight razor shaves. The straight razor, characterized by its blade that can be honed and is often referred to as a cut-throat razor, provides a close shave and requires skill and technique to use effectively. It is traditionally designed with a folding blade for easy storage and maintenance.
On the other hand, safety razors can also be used for close shaves but involve a much different blade exposure as they are designed to reduce the risk of cuts and nicks. The safety razor has a protective guard that helps prevent the blade from making direct contact with the skin, making it a safer option for those who may not be as experienced with a straight razor.
Together, these two types of razors represent tools that a barber would typically use for a professional shave, making them the right choice for this question.