into the barrel 10 through the tip assembly 12 when the plunger 15 moves backward to create a vacuum as mentioned before the recess or groove 15 in the plunger assemby 14 due to the small clearance between its walls and the barrel 10 may store some of the sucked in solder thereby to keep the barrel 10 clean the barrel 10 trigger housing 41 and loading guide 22 may consist of acrylonitrile butatiene styrene the remaining material such as the trigger slide 42 the two plunger cylinders 20 and 21 may for example consist of acetal copolymer or homopolymer also the tip of the tip assembly 12 may have a larger diameter than that of the conventional models the tip cleaning rod 19 may be of aluminum the inner diameter of the barrel 10 may for example be 13 8 34 this is substantially larger than that of conventional desoldering tools preferably all parts are injection molded referring now to fig9 there is illustrated manual loading of the instrument described by means of the bumper 35 the entire assembly consisting of the loading guide 23 plunger loading cylinder 20 and plunger loading piston 21 are pushed toward the left this will compress the spring 60 as shown until the entire assembly is close to the trigger assembly 40.