Kwikset 660 Series 660M 3 SMT CP RCS K6 Deadbolt, Traditional Design, 3 Grade, 1 -Cylinder, 5-Pin Cylinder, KW1 Keyway, Keyed Key, Re-Key Technology: SmartKey, Adjustable Backset, 2-3/8, 2-3/4 in Backset, Drive-In Latch, 1 x 2-1/4 in Faceplate, 1 in Throw Length, 2-1/8 in Cross Bore Diameter, 1 in Edge Bore Diameter, 1-3/8 to 1-3/4 in Door Thickness, Residential Commercial/Residential, Zinc, Polished Brass, Includes: (2) Keys
| Design | : | Traditional |
| Material | : | Zinc |
| Security Grade | : | 3 |
| Finish | : | Polished Brass |
| Number of Cylinders | : | 1 |
| Cylinder Type | : | 5-Pin |
| Keyway Type | : | KW1 |
| Key Type | : | Keyed |
| Re-Key Technology | : | SmartKey |
| Suitable for | : | Mobile Homes |
| Includes | : | (2) Keys |
| Backset Type | : | Adjustable |
| Backset Size | : | 2-3/8, 2-3/4 in |
| Latch Type | : | Drive-In |
| Faceplate Size | : | 1 x 2-1/4 in |
| Throw Length | : | 1 in |
| Cross Bore Diameter | : | 2-1/8 in |
| Edge Bore Diameter | : | 1 in |
| Door Thickness | : | 1-3/8 to 1-3/4 in |
| Commercial/Residential | : | Residential |