Description: brand new and high quality These self centering drill bits put hinges right where they should be in the center 4 of the most often used sizes for carpenters, cabinet, furniture makers and other wood working trades Easy to use and install Positioning accuracy, will not shift, the chips will automatic discharge from the hole on either side of the top of the drill, not stuck drill Size: 5/64'':Hole diameter is about 2 mm,Use about 2.2 - 2.8 mm tapping screw 7/64'':Hole diameter is about 2.8 mm,Use about 3 - 3.5 mm tapping screw 9/64'':Hole diameter is about 3.5mm,Use about 4 - 4.5 mm tapping screw 11/64'':Hole diameter is about 4.5mm,Use about 5 - 5.5 mm tapping screw Material: Brass, HSS Color: Sliver Quantity: 1 set(4pcs a set) Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding. Package includes: 4 x Wood drill bit tools Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia