Gun-tips are a strong and durable replacement for cotton swabs that do not leave lint and fibers behind. They are flexible enough to round corners"" but strong enough to resist breaking. Gun-tips are also washable and reusable. The 3"" Precision Tip swabs are especially effective for triggers and frames"" slide rails"" barrel links"" trigger assemblies"" compensators"" barrel extension and lug recesses"" bolt cams"" extractor ports and other hard-to-reach areas. Also great from applying lubrication/grease with pinpoint accuracy.