Description of Screwdriver Tools Set 45PCS 45pcs in 1 screwdriver set includes 42 insert bits, 1pc rubber handle, 1pc extension rod and 1pc tweezery. Non-slip rubber design of handle for comfortable to operatey. Comes with extension rod can be inserted into the handle for length adjustmenty. It comes with plastic storage box for easy transporty. Please refer to picture for detailed types of insert bitsy. Made of sturdy steel with precision-machinedy. By using this set of tools, you can remove the small part of your cellphone/computer/Mp4...and repair the device without damaging it.