Self Centering Door Window Hinge Set Twist Wood Drill Bit Hole Puncher - 7 pieces per set Benefits you can depend on - Precise self-centering design: positions accurately and will not shift during drilling, ensuring hinge screw holes line up perfectly every time. - Efficient chip management: wood chips are automatically discharged from the top sides of the drill bit, reducing blockage and maintaining drill speed. - Simple hinge hole preparation: specifically used to open hinge screw holes for doors and windows, making hinge installation faster and cleaner. - All-in-one set: 7 pieces included to cover a range of hinge hole sizes and drilling needs. What you get - 7 pieces set: Self Centering Door Window Hinge Set Twist Wood Drill Bit Hole Puncher Material and performance notes - Designed for clean, centered holes in wooden doors and windows. (Note: specific material details are not provided.) Applications and use scenarios - New door or window hinge installation: drill accurate screw holes for hinges on wooden interior or exterior doors and windows. - hinge replacement on existing openings: create correctly aligned screw holes when upgrading or repositioning hinges. - Renovation projects involving wooden frames: quickly prepare precise hinge holes during refurbishments or custom carpentry work.