CTK tool wooden sound deadener Roller for knurling of vibrodamping and sound insulating materials. A comfortable wooden handle fits easily in your hand. The rolling CTK Roller allows to roll materials evenly and qualitatively. 20 Rollers in one box. There are 2 types of rollers available: 1) CTK Roller (photo abobe). 2) CTK Roller L, length 125 mm. – Roller for knurling vibrodamping and sound insulating materials in hard-to-reach places (photo on next page).