Pratley Pratlok Grade 10-20 (50 Grams) by Pratley Save 65% Original price $12.50 Current price $4.37 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart High Strength (White lid) Typically for M10-M20 studs and bolts Disassembly difficult without heating Use on studs, bolts and threaded pipe fittings 50 Grams Information Leaflet Safety Data Sheet