• patent-pending design
• installs in minutes...simply drill a single 3/8" hole
• includes convenient drill-jig block, no measuring or marking
• keeps children safely inside and others outside
• precision-machined, high-strength steel construction
• premium nickel plated finish
• no mounting hardware required
• modern, minimalistic design
• also works with interior shutters
• easily removed, no tools
• proudly made in the U.S.A.
• $29.95 + tax (FREE SHIPPING INSIDE USA)