KS Tools 440.0591 Extension Diameter 38 mm Length 70 mm Innovation is our mission! This is a well-known motto from KS Tools. We strive to work close to the customer and to offer problem solves for professionals. This is the only way to bring tools to the market that are accepted by customers. Still is a foreign word for us. The future is for progress and further development. Since the company was founded on product innovations that inspire and now a wide range of products that meet all requirements. All of our efforts have made us one of the largest international tool manufacturers with customers in more than 135 countries in the world. And we're not over yet. .