This unique device imparts very high pressure with heated rollers unlike other brands that use flat heater plates without any pressure to speak of - those types of laminators do not work at all. This unit performs like a multi-thousand dollar "hot roll" laminator at an affordable price. The trick to all of this is that the manufacturer (GBC) externally heats the rollers by radiating heat into the neopreme-coated rollers positioned from heaters positioned 180º away from where the rollers touch each other, (eg. one heater mounted above the top roller and one below the bottom roller). This amazingly simple engineering trick makes manufacturing of this device inexpensive yet performs like the very expensive internally heated, large format hot roll laminators.