You have to press too hard to get enough flux, the felt dries too quickly. solder at a great distance. In truth, don't buy these, buy Amtech syringes instead, the product is much better.
For locksmith, repair and precision work Stels Tool set, 1/2", 1/4", CrV, 82-pcs plastic case, Stels, 82-pcs, silver
39 Review
Cordless drill driver Metabo PowerMaxx BS Basic 600080500
68 Review
Makita DK0122 corded power tool set
77 Review
π§ Dewalt DCD791D2 Compact Li-Ion Brushless Drill
86 Review