12V Switch Toggle 20A Rocker BLUE LED Light SPST ON/OFF Car RV Boat ATV Truck (Pack of 4) Uses include: Boat, Car, RV, Custom lighting and electronics Function: On/Off ; 3 Terminals as shown 20A Max Load; 10-14V Operation; Insulation R:500V DC 100M min; Electrical Life:15,000 Cycles Screw hole is roughly 1cm +/- ; Please do not drill your holes until you have the product in hand; See picture for measurements Pack of 4