High quality material, durable in use, easy and convenient to use. Precise measurement: 2 mobile arms for measuring 85 to 180 ° angles can be directly used to measure all angles within this Efficiency two in one tool: the miter can be measured, and the cutting is completed without using multiple tools to avoid errors when transferring the correct to the saw. Precise sawing: use the integrated guide pin of the saw to place the base plate on a guide plate provided, and use the back saw to sawing to achieve accurate and error beveling. Practical measurement+tool: it is used to solve the problem of chamfering in skirting boards or grooves requiring special measuring tools, and is used for pipe installation, home decoration and woodworking.