These are for SDTA pig tubes, SDTA barrel shrouds and Maglite flashlight end cap.
The SDTA muzzle brake adapters, 1/2X28, 5/8X24 and solid cap have spanner wrench holes and are .100 thick protruding from the shroud or pig tube. The Griffen protrudes .480 from the shroud or pig tube. The Gemtech protrudes .265 from the shroud or pig tube. The aluminum is 6061, Titanium is 6AL-4V and Carbon steel.
Titanium anodizing can only be done on titanium components. Please look on main categorizes under titanium anodizing for more information. If you are looking to have 10 or more pieces anodized click NO on the drop down and order the anodizing under the titanium anodizing main category. This will save you money.