1. Hinge hole positioning ruler, made of high-quality aluminum alloy, suitable for 35mm straight arm/mid-bend hinges, hole margins of 3/4/5/6mm. 2. It can be adjusted according to needs and has a wide range of applications! 3. The limit hole opener is a carbide blade with high-temperature heat treatment on the blade edge, high hardness, and wear-. 4. Application: Suitable for home cabinet door, cabinet, wardrobe hinge installation, accurate positioning, simple and convenient operation. 5. This precision-crafted 35mm Concealed Hinge Jig is essential for anyone looking to install hinges on doors, cabinets, , and other furniture seamlessly. Product name:Hinge installation hole positioning ruler Applicable hinges:35mm straight arm/mid-bend Hinge cup margin:3/4/5/6mm four-level adjustable Colour:B:Red Material:Aluminum Alloy Size:85x80x75mm Package Contents: 1 x Hinge installation hole positioning ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.