Kwikset 720LL 15 6AL RCS Lido Passage Door Leverset from The Signature Series, Satin Nickel

The tubular lock is the most common type of locks. Most doors typically have bores specifically made for installing tubular locks. They are used mainly for interior doors for bedrooms, bathrooms, passages, and closets. Tubular locks are available with a key tumbler lock in the knob on the outside of the door or with a turn button or push button on the inside.