COMOWARE 17pcs VIX Bits Self Centering Drill Bit Set, 1/4" Hex Shank Self Centering Hinge Drill Bit Set for Woodworking Window Door Hinge, Quick Change with 1 Hex Key & 8 Drill Bits 5/64-1/4”

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Durable Drill Bits: The 16pcs self-centering drill bit made of high-speed steel drill bit & quenching treatment shell designed. Adjustable drill depth, high hardness, rustproof, durable and superior drilling performance. The best choice to send Senrob counter drill bit as a gift for your father, brother or husband Wide Applications: Senrob counter drill bit is a standard bit with all size to meet your need, could make a nice touch for wood projects or work in most quick disconnect adapters like a wood window or door tapping, etc Accurate Tool: Adjustable design allows you to replace drill easily. The automatic positioning center improves positioning accuracy and efficiency. Wood chips will be automatically discharged from the holes on both sides of the top of the bit, which will not block the bit. It is a must for professionals and DIY personnel.holes, They make alignment of holes so much easier and you can get center every time EXCELLENT DESIGN: The center drill set features self-centering to reduce bit walking increases precision and efficiency when drilling. Double-sided hole design - fast & automatic discharge Sawdust from the hole on both sides, without a drill, blocked All Size You Need: Hinge drills come in 8 different sizes: 5/64', 7/64'', 9/64'', 9/64’’, 11/64'', 13/64'', 5mm, 1/4", with a hex key to meet your needs.