Sigma Lock Tight Suction Cup The Sigma TC51C Lock Tight Suction Cups are engineered for secure handling of large-format tile, porcelain panels, and slabs. With a reinforced aluminum body and high-grip rubber pads, these cups provide strong, reliable suction to keep heavy materials stable during lifting, transport, and precise placement. Designed for professional installers, they improve safety and efficiency on the jobsite. Features Holds up to 88 lbs, perfect for heavy panels and slabs Lock-tight lever keeps suction secure and reduces slipping 4.7-Inch Suction Pads: Large surface contact increases stability on smooth and lightly textured materials Clamp-style design distributes weight evenly for safer lifting Manual operation, no pumps or power needed Reduces installer fatigue while keeping precise control Compatibility Works seamlessly with Sigma Kera-Lift systems or standalone setups for added suction support during handling.