member 32 and aligned or integrally formed with the flat bottom surface 34 b line 37 a defines the end of the channel 38 where the fold of the folded end 5 b of the finishing bias 5 should be slid line 37 b illustrates the end of the overhang 37 and thus end of channel 38 channel 38 is adapted to receive therein the folded end 5 b of the finishing bias 5 sliding the u201c j u201d shaped forward end 34 allows the folded end 5 b of the finishing bias 5 to be moved or slid into the channel 38 nevertheless the folded end 5 b of the finishing bias 5 can be threaded into the channel 38 without sliding the u201c j u201d shaped forward end 34 referring now to fig7 a 7c the bottom clamp member 40 includes a parallelogram member 42 that has a u201c l u201d shaped forward end 44 that is integrally formed therewith the u201c l u201d shaped forward end 44 is wider with than the parallelogram member 42 as best seen in fig7 a and 7b the parallelogram member 42 is adjustable and fits and slides within the bottom slot 22 b of the u201c u u201d shaped clamp 20 furthermore the parallelogram member 42 has formed therein a threaded aperture 46 for receiving the screw 27 b tightening the screw 27 b tightly sandwiches the bottom clamp member 26 between the screw head and the parallelogram member 42 and secures the bottom clamp member 40 in place loosening the screw 27 b enables the screw 27 b to move along the length of channel 27 a thereby.