Peakworks introduces a patented tool tethering system, designed to protect workers from tools dropped at height. Durable, long-lasting and temperature resistant, these unique tool anchor clamps are specifically designed to prevent tools from falling through commonly used 19-4 construction site grating. No other tool tethering system offers this added safety feature. Rigorously tested at the CSA test lab to ensure maximum safety, these high-strength clamp fasteners are easily installed and removed using the hex key wrench provided. Available in 2 sizes, comes with standard hex shaped opening and includes a separate rubber insert that can be placed between the tool and the clamp for extra sizing compatibilities and increased clamping grip. Designed for use with round and hex shank tool bodies and larger tools.