[Easy to Use] Align the locator with the marking line put it on the cabinet door cover the red bezel on the edge mark the center of the hole and two screw holes with a marking tool. Ideal for builders professionals and woodworkers. ;) [Unique Eccentric Wheel Design] The hinge hole locator is designed for ordinary 40mm connecting rod the position of the eccentric wheel hole is designed move up 1.5mm which can achieve tight splicing. ;) [Practical Drilling Locator] Drilling guide rails are widely used for hinge installation of cabinets doors and windows folding tables and other furniture practical and convenient. ;) [Reliable and Wear-resistant] The drill locator is made of aluminum alloy the surface is sandblasted and the drill sleeve is made of stainless steel which is wear-resistant and has a long service life. ;) [Efficient] This drilling locator is suitable for common 35mm straight arm and medium-bend hinges improving installation efficiency. It has imperial and metric scales for ease of use. ;)