We use only the best steel needles nickel-plated steel needles do not rust, not easy to bend and not brittle The quality of the T-type screed is good or bad, mainly depends on two points: the first is the design of the thread, which is divided into full thread or half thread. The full thread has a longer service life and is not easy to slip, so it can rotate with less effort. The second look at the steel needle, the steel needle first to see is a round needle or policy, the round needle will not scratch the enamel of the tile when rotating! The second is the material and hardness of the steel needle, our factory uses a diameter of 1.5 mm manganese steel material + galvanized heat treatment of high-quality steel needle, smooth surface, moderate hardness, not easy to deformation, longer service life! Use the T-shaped screed to leave a slit, which can be matched with the cross card. For example, leave 2 mm brick seam with 2.0 cross card adjustment! Then insert a steel needle into the seam and rotate it to make room for easy removal! Note that 4-6 hours after the tile leveling, be sure to take out the cement or tile glue when it is not dry! If you cannot place an order online, please contact Miss Jin 15868775777 Miss Liu 18658771111