Features:100% brand new and high quality.All screw are standard metric coarse pitch.Not rust under the damp environment,strong anti-oxidation ability,corrosion resistance.This is one of a series of kits in colour coded compartment boxes that are designed to stack.They are very strong, do not allow components to move around compartments in transit and close very securely.Specification:Color: BlackHead type: Flat round headGroove type: CrossMode of action: Self-attackSurface treatment: Oxidized blackMaterial Grade: Carbon Steel Q235ParameterTypeAmountNo.4 x 3/8" (2.9mm x 9.5mm) 60PcsNo.6 x 1/2" (3.5mm x 13mm)60PcsNo.6 x 5/8" (3.5mm x 16mm)50PcsNo.6 x 1" ( 3.5mm x 25mm)30PcsNo8 x 3/8" (4.0 x 9.5mm )30PcsNo.8 x 1/2" (4.0mm x 13mm)40PcsNo.8 x 5/8" (4.0mm x 16mm) 30PcsNo.10 x 1/2" (4.8 x 13mm) 40PcsPackage Included:340 x Screws (with the case)Notice:Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering.Please understand that colors may exist chromatic aberration as the different placement of pictures.