Roland blade holder: 1.diameter:12, 14, etc. 2. durable; 3.high-precision Roland blade holder FEATURES:1.wildly used:can be used for different kind of paper and poster cloth;2.high accuracy ,fast speed,big friction during paper feeding progress;3.no harm for paper;4.unaffected by tempreture,humidity,dust;5.unwarming,non-slip,high-efficiency in continuous operation;