This product is a high-quality laboratory equipment adjustable parallel measuring instrument, can be used to check the undercut of each abutment and mucosal tissue with the analyzer's analytical rod. The observation line of each abutment can be drawn to determine the number and distribution of each abutment, the position and type of the snap ring and the large connector, and the size of the abutment. Conducive to the fixation and seating of the denture, check the soft tissue undercut, design the boundary of the base extension. It can be used to determine the seating position of the denture and the wearing of the denture. The dental laboratory surveyor is fully adjustable, with a full range of mobile phone holders and 7 additional replaceable spindles.