Door and window hinge opener woodworking drilling hexagonal drill positioning special-shaped drilling set tool Name : door and window hinge, hinge opening tool Material : brass shell, high speed steel drill core, surface electroplating Product specification and mode l: 4PC includes: 5 / 64 '', 7 / 64 '', 9 / 64 '', 11 / 64 '' 7PC includes: 5 / 64 '', 7 / 64 '', 9 / 64 '', 11 / 64 ''5mm13 / 64 ''1 / 4 '' Product weight : 5 / 64 "- 11 / 64" four piece suit: 110g 5 / 64 "- 1/ 4" four piece suit: 220g Package size : The size of 8pc plastic box is 13.5 * 13.5 * 1.8cm Opening size : 5 / 64 '': the opening diameter is about 2mm, and about 2.2-2.8mm self tapping screws are used 7 / 64 '': the opening diameter is about 2.8mm, and about 3-3.5mm self tapping screws are used 9 / 64 '': the opening diameter is about 3.5mm, and about 4-4.5mm self tapping screws are used 11 / 64 '': the opening diameter is about 4.5mm, and about 5-5.5mm self tapping screws are used 5mm: the opening diameter is about 5mm, and about 5.5-6mm self tapping screws are used 13 / 64 '': the opening diameter is about 5.2mm, and about 6-6.5mm self tapping screws are used 1 / 4 '': the opening diameter is about 6.35mm, and about 7-7.5mm self tapping screws are used Usage : please adjust the hole according to the hardness of the wood. If the wood is soft, you can choose the smaller one. If the wood is hard, you can choose the corresponding or larger one Features : accurate positioning, no displacement, 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. The door and window hinges are fixed on the doors and windows through screws. This product is used to open the screw holes of door and window hinges. The drill sleeve can well fix the position, ensure the drilling accuracy, and is a good tool to improve the drilling efficiency of coaches!