Gasket Installation Tool for large, thick heavy-duty walk-in;doors;- Installs gaskets faster. ;- Eliminates kinks and misalignments.;- Reduces thumb fatigue.;;Provides the perfect amount of pressure to securely fasten;push-in/dart style gaskets with no gaps or kinks. Coated;rollers protect door frames as well as gaskets.;;- Ideal for door/gasket combined widths between 3" and 5";- 17" long;- 1-3/4" minimum adjustable roller gap;- Includes 3/16" hex key wrench;- Foam rubber grip handle