Material: HSS - High Speed Steel(High Speed Steel Drill Bits, Brass Body, Steel Shank)
Shank Diameter: 1/4" Hex Shank (6.35mm)
High speed steel with a brass body designed, durable and excellent for use
Easy to use and install, change bits fast which one-handed load and release; Drill bush for precise positioning, will not shift; Sawdust will be automatically discharged from the top of the drill holes on both sides, not stuck drill
Use Method: Please appropriate adjustments according to the hardness of wood when opening,if wooden cottage,you can choose a smaller size,if hard wood,choose corresponding or a bigger size.