Korda have recorded that you can get the same grip with a 1.1oz Grippa as you can with a 2oz Swivel Pear Lead.
So with that in mind you can get away with a smaller lead to do the same job which is an advantage when fishing for barbel and chub on the rivers. Also a lighter lead makes a smaller splash so we like using them for casting to gently sloping island margins where a round lead can roll down.
The Grippa has become massively popular on the continent where carping in wide fast flowing rivers is the norm and where you have to boat out baits massive distances.
Please note that this product is subject to design change by the manufacturer and may differ from the image shown.