Features:1.100 high quality.Rugged and durable, it is made of metal and is not easily broken.2.Efficient cutting, durable and stronger.3.The positioning is accurate and will not shift, and the wood chips will be automatically discharged from the holes on both sides of the top of the drill bit, and the drill bit will not be stuck.4.Stable performance and long service life.5.Used for opening holes in wood, plastic, thin iron plate, thin aluminum plate, etc. Notice:Please allow 1-3cm deviation due to manual measurementActual color may be slightly different from the image due to different monitor and light effectDescription:Material:High Speed SteelSize:as shown Package List:4/7x Self Centering Drill Bits Set