Benchmade Bugout 535 Titanium Replacement Thumb Stud. Will fit by series number: 533, 535, 537, 940, 551, 552, 553, 710, 730, 950, 570, 590, 565 Series Knives Fit by name/series:Mini Bugout Bailout 940 Series (940 All, 941, 942, 943) 945 Series Griptilian Mini Griptilian Mini Crooked River North Fork FolderMini-Freek Vallation Mini Vallation Triage Adamas Contego Mini Barrage Boost Emissary ▪️Titanium construction ▪️5 Colors: Black, Blue, Silver, Green, and Gold 🔺1x Thumb Stud (female + male side) 🔺Knife Not Included 🔺Torx-6 or T8 driver, it will tighten, be careful not too tight or risk stripping, recommend blue lock-tite on threads. Fast and FREE same or next business day shipping from Austin, TX!