Sammys’ threaded Rod Anchors for 1/4″, 1/2″ or 3/8″ Rod into concrete, steel or wood substrate. DST (shown), GST and CST standard models are standing stocked items in Duco Fastener Systems service centers in Florida and Illinois. Sammys are Made in the U.S.A. and are a popular choice for Government funded projects because of their high specifications, approvals and American content. Other Sammys products include Ceiling Screws, Sammys Toggle bolts, Speedy Pole tools and more. UL and FM approval numbers please see technical section.