The Strike Industries Extended Selector Switch for CZ Scorpion EVO is an ambidextrous selector switch option that allows the shooter to add easy-to-reach controls with the unique ability to manipulate with either your thumb or index fingers. Extended in both directions to give you your preferred option to manipulate the selector. Grooves are designed onto the selector switches to ensure control even in wet conditions. Retain the factory ambidextrous controls of the CZ Scorpion EVO with the left and right included selectors. Made from durable and lightweight polymer, this drop-in SI Extended Selector Switch is a perfect pairing with the 15 degree angle of the Strike Industries Pistol Grip for CZ Scorpion EVO (sold separately) and will give you improved ergonomics over the originally designed CZ factory parts and especially no pinched fingers.