Stahlwille 01290004 Screwdriver sockets, Size 4 are use for recessed head screws Phillips-Recess®. This Screwdriver socket has 1/4 inch drive, 28mm length and weighs 14g. Made of oil hardened chrome alloy steel which is chrome plated. 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 Screwdriver sockets unite these positive qualities in a manner which 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.