Irwin 6X is one of the best and fastest marking spool devices on the market. It's especially great for pro use. The big, 90-degree swivel lid makes adding ink quick and easy. This spool's rewind ratio is six times faster than traditional paint spools. HI-TENSILE thread is 2.5 times stronger than regular threads and won't snap on rough or uneven surfaces. The removable back panel lets you swap and clean the thread fast. 6 times faster!Easy to fill and cleanWide hookAluminum case