【Satisfy all you demand】:16-in-1: 5/64', 7/64'', 9/64''*2, 11/64'', 13/64'', 5mm and 1/4 with 1 Hex Key & 8 Replacement bit.All center drill bit shank diameter is 6mm. Suitable for most general purpose electric drills.
【Professional Drilling Tools Set】 :The bits are surrounded by spring loaded guides that have a window to show the drill bit depth while making adjustments.135° inclined blade drill bit make drilling easier and faster.Sawdust will be automatically discharged from the top of the holes on both sides, without drill blocked.Drill bush for precise positioning, will not shift.
【High hardness, durable】:High-speed Steel, with a brass body designed, High hardness, durable and superior drilling performance,excellent for use
【Easy to use and install】 :Unique design and perfect punch-effect. Applicable for the installation of the door hinge. Easy to use and install, change bits fast which one-handed load and release.
【Widely Applications】:The spring loaded guide centers the built-in drill bit inside the holes of a door hinge, cabinet hinge, bracket, or other hardware that requires a centered pilot hole.Widely be used for carpenters, cabinet, furniture makers and other woodworking,etc.