The Aqua-Jaw Carry Vise promotes safer, more ergonomic lifting and moving to reduce strain and injury. This is the only all-weather carrying clamp designed to not slip off the wet stone, and its super-strong vise action allows carrying stone upstairs and other slanted or challenging terrains. Aqua-Jaws are the highest-capacity carry clamps on the market, accommodating up to 800 pounds per pair. The clamps open wide (to 4.25″) for thick edges and miters, and have an optional Handle Kit which allows four people to share the load of heavy stone. Dual quick-spin tightening handles easily secure the product in place and rubber-lined gripping rails protect tops from scratches. PRODUCT HIGHLIGHTS Designed to not slip off wet stone Stays attached when going up stairs Vise-grip holds evenly to stone for safer, easier carrying Highest capacity carry clamp on the market at 800 lb per pair Opens wide for thick edges and miters Optional Handle Kit allows four people to share the load Rubber-lined gripping rails protect tops from scratches Foam handle grips are UV, ozone, and moisture resistant Clamping range: 0.15″ – 4.25″ (4 mm – 108 mm)