1. Quality material: t-pins steel needles are made of stainless steel, which are durable and sturdy, with nice abrasion resistance, impact resistance, pressure resistance and wear-resistant, can serve you for a long time. 2. Sufficient quantity: the package comes with 50 pieces tile installation tools for tile leveling system, and they be replaced in case of broken or deformed needle; Abundant quantity can meet your daily needs and replacement. 3. Size details: each replacement t-pins steel needle measures about 32 mm/ 1.26 inch in length, thickness is about 1.5 mm, the right size is suitable for tile gaps between 2 to 6 mm, and suitable for tile with a thickness of 0.12 inch/ 3 mm to 0.63 inch/ 16 mm. 4. Apply to: the replaceable t-pins needles kit fits well for floor/ wall setting; The system ensures flatness between tiles avoiding movements during the mortar setting. 5. Easy to install: replaceable pin tool is easy to use, only need to remove the nut cover, insert the T-pin steel needle into the groove, put the red cover into the groove, and tighten the nut cover; Remove the T-type straightener about 5-6 hours after leveling before the tile binder or cement is completely dried; It will increase tile installation speed and be more cost effective