Wear-resistant, recyclable. Easy to use in DIY operation. Balance tiles in the same horizontal position. Improve the installation speed of tile. Reduce the fatigue/pressure of installers. There is hardly any crackless, flat surface. It reduces the need for grinding and polishing. Prevent tiles from moving during solidification. skills: Lay the first tile, leaving a thickness of more than 2mm (with cross washers). Close to the tiles. Insert the T-pin along the space between the tiles. Then rotate it 180 degrees and fix the T-shaped pin on the bottom of the two tiles. Use a hand/special wrench until both tiles are on the same level. About 5-6 hours after leveling, before the cement/adhesive is completely dry, rotate the cover in the reverse direction and take out the 180 degree T needle until Name: Steel Needle for Ceramic Tile Leveling System Type: 200 steel needles Colour: silver Material: stainless steel metal Size: 1.3mm thick, 32mm long Package Contents: 200 x steel needle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.