Hammer handle size: 52mm. Head diameter: 12mm. Total length: 160 mm. Material: metal hardware stainless steel. Non-slip, slim handle, easy to use and safe. Multi-function copper hammer type: There are 4 screwdrivers inside, including 2screwdrivers and 2 slotted screwdrivers. Compact size and light weight: The compact way allows the tool to be placed in a box or glove box. For those who love small tools, this is a great gift. Widely used: This small multi-function copper hammer is used to repair small parts such as watches and jewelry. The perfect tool, watchmaker, jeweler, nut eater. Screwdriver Size: Phillips: 56 x 3mm/2.2inch x 0.12inch (L*D) Phillips: 25 x 2mm/1inch x 0.08inch (L*D) Grooving: 134 x 4.5mm/5inch x 0.18inch (L*W). Grooving: 40 x 2.5mm/1.5inch x 0.1inch ((L*W) Small Hammer Impressive Small Copper Hammer Usage 1: It is used for modeling and repairing small pieces of jewelry. Usage 2: Used by watchmakers to repair tiny parts of watches. Usage 3: Daily DIY maintenance of various electrical appliances hammer screwdriver copper hammer Small and portable: The compact medium can be easily placed in the house or the glove compartment, which is a good gift for those who like to use small tools. The ideal tool for watchmakers and jewellers.