Description: Uses: side opening, easy and fast, steel wood door, hotel door, ordinary wooden door lock hole opening.Scaled sliding rail: Door Lock Hole Opener has clear scale to help you accurately slot and improve work efficiency. The widened base is more comfortable. The slide rail fine tuning design can be adjusted left and right to ensure the verticality of the slot and the parallelism of the slide rail, linear ball slide rail, larger angle, and more stableStable clamping: Door Lock Hole Opener has high angle parallelism, larger actual contact area, more stable clamping, maintains the accuracy of the hole opening, and shock-absorbing and non-slip soft pads.Positioning circle: Door Lock Hole Opener Kit uses an all steel positioning circle to accurately control the slotting depth, bringing you a better use experience.Easy to use: Door Lock Hole Opener Kit is simple in design and easy to use, without complicated operating steps. Convenient and fast. Specification: Material: Alloy, Steel Size Chart: The Slotter Is 43cm/16.93inch Long, With A Maximum Slot Depth Of 13cm/5.12inch. It Can Clamp A Door Thickness Of 3.5-10cm/1.38inch-3.94inch, And The Maximum Distance From The Door Edge To The Center Of The Lock Core Hole Can Reach 7cm/2.76inch. Package Includes: 1 Slotter Body, 4 Positioning Screws, 1 Ruler, 2 Wrenches, 1 Woodworkings Plow Bit, 1 Positioning Block, 1 Box Note: Please allow slightly errors due to manual measurement and different monitors.