Features: Just press button. The tip heat up instantly and can heat up to in few second. If the replacement tip loose when inserted into thread heater pen, you can bend the tip a little to make them tighter. Perfect for completing beads and rope weaving project and other everyday task. Insert the replacement head in thread pen, then press and hold button for 5 second to use immediately. Please DO NOT cover pen tip when pen tip not cooling down, prevent it from being broken and unable to be used normally. Specifications: Color: Black Material: Plastic; Metal Size: Approximately. 1.4x3.7cm/0.05x0.12in Weight: Approximately. 18g; 35g Package Includes: Package Option Package 1: 5Pcs Replacement Tip Package 2: 10Pcs Replacement Tip note: 1.Please allow 0-1cm error due to manual measurement. make sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color