McKie Knock!
Macky has high cognitive and proven properties, and McKnock is very popular.
One-touch retractable permanent marker
The valve inside the shaft prevents the tip from drying out.
Capless, so you can operate it with one hand, so you dont have to worry about losing the cap.
Can also be used in sites where foreign objects are strictly prohibited.
Can be used for a wide variety of purposes such as paper, fabric, wood, cardboard, glass, plastic, metal, vinyl, etc.
Try it!