ZIJING 20PCS Nail Art Rhinestone Gems Picking Tools Beads Pick Up Pencils Dotting Pens kimmyku Nail Art Rhinestone Gems Picking Tools Beads Pick Up Pencils Dotting Pens QTY: 20 pcs Good for picking 2mm, 3mm & 4mm gems Not suitable for over 6mm rhinestones,They have tested and work on both acrylic & half pearls The pencil is not 'GLUE', its stickiness can only work on picking small objects (ideally under 5mm). The bigger the objects are, the harder you need to press down when picking them,