There are roughly four types of milling machine fixtures used in slotting. 1 is a kind of flat-nose pliers fixture, which is suitable for slotting panels and shafts. 2 is the dividing head fixture, which is suitable for shaft groove processing. 3 is a turntable fixture, which is suitable for machining arc grooves of panels and shafts. 4 is V-shaped iron fixture, which is suitable for machining large shaft grooves. The above four kinds of fixtures are necessary accessories for milling machines, and beginners can watch and understand them through milling machine books and online videos.