FUNCTIONAL UTILITY TOOL: Including thumb stud and hex wrench, screws on to most any folder, suitable for blade thickness 3mm - 2.5mm knife. PREMIUM QUALITY: Made from brass and stainless steel which is solid and excellent corrosion resistance. EASY TO USE: Use these thumb studs to add onto a knife blade (like a Buck 110) to a one handed opener. POTABLE AND COMPACT: You can easily attach it on your buck knifes or other knife, it doesn't take up your extra room. GREAT GADGETS: Such the useful gadgets equipped with a buck knife help you to use your knife more confortable and safely. Colour:Photo Color Material:Stainless steel Package Contents: 6 x thumb stud 6 x screws 6 x hex wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.