Yale Brass Effect Round Internal Door Knob. These Yale P405 Rim knobs have a 43mm diameter and are sold as a pack of 2. They are designed for use with Yale 334, 401, and 402 style rim locks. Rim locks are not intended for high-security applications and are best suited for internal doors or sheds where a higher security external door is already in place. The product comes with a 2-year guarantee and has a standard security rating. The finish is polished brass.