The QS Smart Keyless Digital Door Lock is a secure and convenient electronic entry system suitable for security doors. Made from stainless steel with a brushed silver finish, this universal/reversible door lock offers peace of mind with its keyless design. The smart lock is battery operated and can be easily controlled with RF provided. it can be coded individually to each card. Thumb turn internal deadlock, Manual By-Pass Key. Additional secure key deadlock. Left or Right handed - used configured. Modern and stylish addition to any home or business security. 5 available with 20 % discount buying all 5.