combined at one side of the folded pad 4 the initial points of the zipper 35 of the pocket 3 is engaged with that of the zipper 42 of the folded pad 4 and are pulled along the edge of the pocket 3 till the terminal point the pocket 3 is combined with the folded pad 4 as shown in fig5 further the velcro tape 25 33 of the pocket 2 and the pocket 3 are adhered to the velcro tape 41 of the folded pad 4 a main body of the tool bag 1 is obtained however after the combination of the pocket 3 and the folded pad 4 the front face of the pocket 3 includes a tool holding slot 31 and the rear pocket hook section 32 is positioned within the interior of the tool bag 1 the pocket pad 27 of the pocket 2 can be separated from the velcro tape 271 and is placed at the bottom of the bag 1 to enhance the strength of the bag to hold heavy tools the two end hook portions of the adjustable back pocket 5 hook the hook portions 24 32 of the pockets 2 3 so that the tool bag can be hung at the side of the users referring to fig6 and 7 the pockets 2 3 are two plate body for mounting onto the waist of the user the middle space 26 34 are facing each other and the tool holding slots 21 31 face externally the adjustable back pocket 5 passes through the middle space 26 34 of the.