FEATURES-5 Roll Pin Holder Set-Designed to accurately hold roll pin sizes 1/16", 5/64", 3/32", 1/8", 3.5mm-Manufactured from high carbon 5160 steel-Hardened from tip through working end by using Bainite heat treating process for extra strength-A single groove in the handle is for quick identification-The 1/16" is notched to clear M16/AR-15 rear sights-The 3.5mm is excellent for holding the pin that retains the breech block on Sig handguns-100% Made in the USA