Hand Quick: Innovative knob allows 1mm precise calibration without tools, simplifying installation in tight space 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 Wide Compatibility: for stone / glass edges splicing, accommodating varying thicknesses Overcomes traditional levelers ' single limitation, boosting construction efficiency durability Heavy Duty Structure: Reinforced engineering body with metal components resists deformation, while silicone suction cups resist aging for reliability long term use on construction sites Vacuum Suction Fixation: High strength suction structure enables not damage installation without drilling, protecting delicate surfaces like glass and stone slabs from scratches during leveling tasks, Manufacturer: FHGSPQWM