Đồ giữ ốc M3 Hex cap head screw holder

The models originate from a requirement I have when working on the hotend of my Neptune 4 Pro; I work in a tight environment and whereas I can perform most tasks easily from the front of the printer, 2 M3 screws at the back do give me difficulties. I therefor decided to improve my access to these by developing these models. The 3 models address the same task, the largest perform the same task as the other 2 but in a more "hospitable" space and works by pinching the screw head, the other 2 trap the screw head inside a cylinder where 2 dots hold it in place. Onde of those 2 models is designed for Allen keys with a continuing hex shaft (hex hole), the other for round shaft (round hole)