Thumbnails are made of brass and hardened stainless steel for durability and durability. Thumbnails come with a hex wrench, and the replacement thumb button easily screws onto most file folder blades. Compatible with Buck 110 and thickness range from 2.5mm to 3mm. Useful EDC Gadgets can help you use your gadgets more comfortably and safely. Thumbnails are easy to install and easy to open and close. Every hand is different in size and dexterity. Adjust the position to their own liking. The installation process takes less than a minute, and you can easily open and close with one hand and enjoy the fun of putting., Manufacturer: The Lord of the Tools