BDEWALT D180004 Bi-Metal Door Lock Installation Kit ReviewbP PP DEWALT D180004 Bi-Metal Door Lock Installation Kit PDesigned to fit the most common lock sizes in use todayPWorks well with metal or wood doorsPIncludes hole saw consisting of durable M3 steelPAlso includes backing plates reinforced to counteract warpingPBacking plates also aid in easy disassembly from the mandrelP