cactus close needle needles Nyberg pin pins plant texture branch evergreen green needles macro abstract cover covered covering device discarded dose-delivery drug-delivery easy-to-use essential-care fine-points hollow-needles in-use injection-pen-needles injections medical medical-equipment metal multiple-daily-injections pen-needles penetration plastic plastic-caps plastic-hubs safety self-care self-treatment sharp sharps steel thin tips used conifer coniferous light nature ornamental pine shadow sunlight tree flora branches snow spruce winter Cacti dessert prick prickle craft work crochet crochet needle crocheted crocheting culture decorative Designs dexterity fanciwork hobby hooked needle knitting art knots lacework nimble patience patient patterns single needle knitting skill textures