GRK Fasteners 5/16 in. X 5-1/8 in. L Star Washer Head Structural Screws 20 pk SOLAR & LOW VOLTAGE ACCES They have a medium base

They have a medium base that screws into standard sockets

providing reliable and long-lasting lighting performance

Colorful and sporty looking

SandNet disc design fits all 5 and 8-hole orbital

GRK Fasteners 5/16 in. X 5-1/8 in. L Star Washer Head Structural Screws 20 pk SOLAR & LOW VOLTAGE ACCES They have a medium baseThe screws are using self tapping specially hardened steel screw, W Cut thread design as zip tip, climatek coated, sharp threads and points to built in washer for interior or exterior use in carrying beams, ledger boards, stair rails, deck posts, playground equipment and other professional applications. SPECIFICATIONS Zip tip eliminates predrilling and one step inst Unique thread design and washer style head unique W cut low installation torque allows