Stahlwille 12011003 427Qr Quickrelease Socket Extensions, 3/8, Made In Germany. Stahlwille 12011003 427QR QuickRelease Socket extensions bar, Size 10, which is 240mm long with 3/8" square drive. For use with 3/8" square drive sockets and tools. And has a quick-release safety lock. The QuickRelease technology ensures tools can not be inadvertently lost - while enabling rapid, safe tool changes. Stahlwille knows no compromises. All the products made by this company are manufactured at three locations in Germany under the most stringent quality control conditions. The latest manufacturing methods coupled with the use of the highest-grade materials ensure the closest tolerances are adhered to. And last but not least, it is the proximity to the customer and understanding of production processes and requirements that generate the innovation that the market needs. Made in Germany. High-grade materials and ergonomic design that redefines standards. Stahlwille's QuickRelease Socket Extension unites these positive qualities in a manner that is close to perfect. The result is a long-life ergonomically designed tool providing strain-free working combined with maximum force transmission - even with greasy hands. FAST. The QuickRelease technology ensures tools can not be inadvertently lost - while enabling rapid, safe tool changes MADE OF HIGH-PERFORMANCE STEEL. Stahlwille sockets are extremely resilient but thin-walled and gentle. DIN 3123 / ISO 3316 COMPLIANT. Stahlwille's QuickRelease socket extensions are compliant with the German quality standard DIN 3123 SPECIFICATION. QuickRelease Socket extension, Size 10, Length 240mm, Depth 17mm, Weighs 185 grams MADE IN GERMANY Stahlwille continues to redefine standards. The company unites all the outstanding features of traditional German forging, state-of-the-art production techniques, and digital technologies - from classic handtools and automatic calibration systems to interconnected tool solutions for the next generation.