Description Proline has changed the game with these innovative Seamless Magnetic Pattern Stamps. The Fieldstone Paver 24″ x 48″ Seamless Magnetic Set was introduced this year at World of Concrete. Like all of Proline’s Seamless Magnetic Sets, it has no repeat patterns. The magnets on each of the stamps link up the tools to perfectly align the grout lines. Lighter weight for less user fatigue, significantly increased coverage and no joint touch up or squeeze out are just a few of the reasons customers are loving this new seamless concrete texturing system.