Multi Use Torch Kit, 14.1 oz Propane Cylinder, TS3500 Torch no checkout protruding sharp edges and other protruding sharp edges and other workplace hazards Steel shank adds arch support and protection from punctures 100% Waterproof particularly where minor oil contamination of the flange surfaces can occur Particularly suitable for use on aluminum substrates where very good adhesion is achieved Provides resistance to low pressures immediately after assembly melting and heat application Trigger start ignition easily ignites the flame Flame control valve easily sizes flame and extinguishes when finished Versatile webbed flame completes a variety of household projects including small diameter soldering