The ballpoint pen was invented by John J. Lourd in 1888 and became popular, and is still in use today.
 The standard bit-replacement screwdriver is the William H. Bose
 We created a driver design with replaceable bits.
 This module includes two functions: a ballpoint pen and a bit-type screwdriver.
 The ballpoint pen has a 0.5mm diameter and is available in two colors (black and red) from 1 BYTAL™.
 The screwdriver is a bit holder type (+driver, -driver, +small watch screwdriver).
 Included by default.
 It can hold up to 3 bits and the bits are held in place magnetically.
 Compatible with 4mm standard driver bits. Can be replaced with various other bits.
 You can loosen and tighten screws by inserting it into the bit holder on the product.
 There is a magnet inside the bit holder, so not only does it secure the bit,
 The bit itself is magnetized, making it easy to work with the bolt attached.