The Autotorch system 2 Handle (2101 - 2121) has an extensive range of interchangeable burners for many Varied Applications Autotorch Burners (Burner Only). No.2102 Fine Flame Burner for Localised Heating. No.2103 Small Flame Burner for Soldering Small Assembles. No.2104 Medium Flame Burner for Heating, Plumbing and Engineering. No. 2105 General Purpose Heating and Soldering Burner with a Large Well Defined Flame. No2106 More Powerful Flame for General Use. No2121 Well Spread Softer Flame for Heat Shrinking of Plastics and Cable Joining and other Industrial Plastics. Particulalrly designed for Raychem heat shrink sleeves but well used for those of many makes. Also well designed for applications for sleeves, flooring and plastics of many kinds. Care and time is required to make a professional joint with a heat shrink sleeve. Do not allow the flame to play for too long on any one point - keep moving over all the surface of the sleeve until a good joint has been made. If you r