Draper Expert Impact Extension Bar, 1" Square Drive, 330mm - 709Expert Quality, forged extension bars hardened, tempered and chemically blacked for corrosion protection. Supplied with pin and ring. Sold loose. Key Features Expert Quality construction ensures durability and reliability for professional use. Forged design provides superior strength and resistance to wear, making it ideal for heavy duty applications. Hardened and tempered for enhanced performance, ensuring longevity even under extreme conditions.