COMP Cams Lightweight Tool Steel Retainers provide the best of all valve train benefits: light weight, along with exceptional strength and wear characteristics. Approximately 33% lighter than conventional chromemoly steel retainers and only 2-4 grams heavier than titanium (depending upon application), they are made from high-grade tool steel, making them able to withstand even the most demanding race applications. * CNC-machined for consistent quality * Developed using latest FEA and CAD software * Spintron-tested to extreme RPM to prove strength is equivalent to titanium and stronger than chromemoly steel * Designed for both 7° and 10° angles PartNumber : cca1750-12 Description : Light Weight Tool Steel Valve Spring Retainers; 12 Pieces Title : 1750-12 Retainers, Tool Steel 1.250" Spring Diameter : 1.250" Diameter 2 : .870" Stem Size : All Diameter 3 : .735" Diameter 4 : N/A Angle : 10° Diameter 1 : 1.240" Engine Components::Valve Springs, Retainers