Originally £9.99 (I bought this plus the double lifter to install a 2m x 1200mm x 10mm glass shower panel...lifted no problems).
Also available as a double lifter for £1.69 from £6.99http://www.screwfix.com/p/double-suction-lifter/18817
These are on clearance so not available in every store.
Please follow links provided as new version now available (which looks the same) but costs a lot more.
Used for lifting, carrying and positioning glass, sheet material, marble etc. With three 115mm rubber gripping pads for maximum hold.