The classic IRT231 series has set the standard for impact performance for over three decades. Refined engineering design has perfected the performance that has made the IRT231 series the most popular impact ever, rivaled only by IR's composite impacts. IR's elite mechanism is the perfect balance between superior power and proven durability. Featuring a 2" extended anvil with all the performance benefits found in the IRT231HA. Ideal for tire changing and use with flip sockets.