This set of screws consists of ten screws, which are mainly made of durable hard metal material, and for replacing the screws of the bottom cover of Pro Unibody 13" 15" 17". Features - Color: as shown in the material. - Material: durable hard metal. - and Replacement Bottom Case Screws Set. - This set of screws consists of ten screws that replace the screws of the bottom cover of Pro Unibody 13" 15" 17". - Compatible with the following models: 1. Model A1286 - 15": MacBook Pro Core 2 Duo 2.4 late 2008 MacBook Pro Core 2 Duo 2.53 late 2008 MacBook Pro Core 2 Duo 2.53 2009 MacBook Pro Core 2 Duo 2.66 early 2009 MacBook Pro Core 2 Duo 2.66 2009 MacBook Pro Core 2 Duo 2.8 late 2008 MacBook Pro Core 2 Duo 2.8 2009 MacBook Pro Core 2 Duo 2.93 early 2009 MacBook Pro Core 2 Duo 3.06 2009 MacBook Pro Core i5 2.4 2010 MacBook Pro Core i5 2.53 2010 MacBook Pro Core i7 2.0 early 2011 MacBook Pro Core i7 2.2 early 2011 MacBook Pro Core i7 2.2 late 2011 MacBook Pro Core i7 2.3 late 2011 MacBook Pro Core i7 2.4 late 2011 MacBook Pro Core i7 2.5 late 2011 MacBook Pro Core i7 2.66 2010 MacBook Pro Core i7 2.8 late 2010 2. Model A1278 - 13": MacBook Core 2 Duo 2.0 late 2008 MacBook Core 2 Duo 2.4 late 2008 MacBook Pro Core 2 Duo 2.26 2009 MacBook Pro Core 2 Duo 2.4 2010 MacBook Pro Core 2 Duo 2.53 2009 MacBook Pro Core 2 Duo 2.66 2010 MacBook Pro Core i5 2.3 early 2011 MacBook Pro Core i5 2.4 late 2011 MacBook Pro Core i7 2.8 late 2011 MacBook Pro Core i7 2.7 early 2011 3. Model A1297 - 17": MacBook Pro Core 2 Duo 2.66 early 2009 MacBook Pro Core 2 Duo 2.8 2009 MacBook Pro Core 2 Duo 2.93 early 2009 MacBook Pro Core 2 Duo 3.06 2009 MacBook Pro Core i5 2.53 early 2010 MacBook Pro Core i7 2.2 early 2011 MacBook Pro Core i7 2.3 early 2011 MacBook Pro Core i7 2.4 late 2011 MacBook Pro Core i7 2.5 late 2011 MacBook Pro Core i7 2.66 early 2010 MacBook Pro Core i7 2.8 early 2010Package List10 * Replacement Bottom Case Screws Set for /MacBook Pro Unibody 13" A1278 15" A1286 17" A1297