Screwdriver with bit storage

Design for a screwdriver/ bit holder with some cool features:Hexagonal shape exterior with embossed pattern for extra grip.Knurled cap that works as stubby bit holder, 2 designs small with flat top and larger with domed top.Space for ¼ hex bits: either 9x 25mm bits or 3x 50mm and 3x 25mm bits or any other combination (there are 3 channels of 75.5mm length)Space for optional 5mm diameter magnets at the bottom of the hex holes. DimensionsLength: 115mm (domed cap), 110mm (flat cap)Diameter: 24mm, (hex size 21mm) Inspired by Caran D'Ache 849 Roller Pen