Clippers are an electric tool that cuts hair very short. A set of clippers, use the clippers, a number two on the clippers.
The numbers are guard lengths: a number one leaves about three millimetres and each step adds three more. It is plural-only in this sense. Nail clippers and garden clippers are the same word for quite different tools.
1nounclippersAn electric tool that cuts hair very short.
“The barber ran the clippers over the back of my head.”
clippers is a tool.