This Proxxon screwdriver set has an ergonomic design which allows for excellent handling and ease of use. The handle is made up of two components and has the 'FLEX-DOT' nubs for comfortable continuous use. The handle is also oil and acid resistant and is made up of a non-stick rubber. These screwdrivers have a processed black tip giving you greater precision for accepting screws and prevents the tool from slipping. Includes sizes: HEX 5.5, 6, 7, 8, 10 and 13. 2 year guarantee.