Only need to remove the nut cover, insert the t-pin steel needle into the grooves, put the red cover into the grooves, and tighten the nut cover.Remove the t-type straightener about 5-6 hours after leveling before the cement is completly dried; it will increase installation speed and be more cost effective The replaceable steel t-pins kit fits well for flooring wall replacement leveling; the leveling ensures flatness between tiles avoiding movements during the setting Each replacement t-pins steel needle measures about 32mm / 1.26inch in length, thickness is about 1 / 16 inch / 1.4mm, the right size is suitable for space between 2 to 6mm, and is suitable for laying from 0.12 " / 3mm to 0.63 " / 16mm thickness, keeping the tiles in the same horizontal position and from moving during the setting process The 300pcs steel needle is stainless steel, which is strong and, with good wear resistance, resistance, pressure resistance and abrasion resistance, and can serve you for a long time This installation tools not only improves the efficiency of the and laying process, but also provides you with a perfect surface, Manufacturer: JKRNEJGR