Professional 90degree countertop seam setter with rightangle clamping for precise seam joining and leveling on stone countertops. Key benefits Delivers accurate 90° joints on granite, quartz and other solidsurface materials Speeds seam work and reduces rework by delivering repeatable clamping results Compact, easy to handle tool that improves workflow in fabrication and installation What it is and how it performs Material and build: made from stainless steel and PP, resistant to deformation, durable for daily use Easy to use: suction cup tightens when handles are pressed together; loosens when handles are at a 90° angle for quick release Stable and adjustable: strong suction with two leveling knobs for precise alignment; stays firmly in place during work Compatibility and size Compact design suitable for standard countertop seams Works with granite, quartz, marble and other solid surface countertops How to use Attach the tool with the suction cups to the seam area Squeeze the handles to engage the suction Use the two knobs to dial in exact leveling Align the seam, then move handles to 90° to release Use scenarios Installing kitchen countertops and joining long granite or quartz seams Aligning and leveling stone countertop seams in fabrication shops Leveling edge seams on bathroom vanities or island tops for a clean, professional finish