Weller PSI10 Hot Knife Soldering Tips are designed to cut & cauterize synthetic materials. It has a tip width of .195 and is designed to work with the Weller PSI-100 and provide a temperature range of 850ﾰ F with a reach of 1.485 in. Use only accessories or attachments which are listed in the accessories list of the Operation Manual. Use only WELLER accessories or attachments on original WELLER equipment. Use of other tools and other accessories can lead to injury.