Precise 90 Degree Positioning:Adjustable design ensures accurate 90degree /270degree alignment for stone edges, solving manual splicing angles deviation issues. Ideal for high precise scenarios like glass countertops and feature wall. Fixation :High strength suction structure enables not damage installation without drilling, protecting delicate surfaces like glass and stone slabs from scratches during leveling tasks. Wide Compatibility:Optimized for stone/ splicing, accommodating varying thicknesses. Overcomes traditional levelers' single limitation, boosting construction efficiency. Hand Quick :Innovative knob allows 1mm precise calibration without tools, simplifying installation in tight space. Package includes: 1pc Adjustable Suction Cup Lifter