Rotating cap for precise control and screw turning with fingertip Anodized aluminum alloy handle combine 4mm & 1/4” type bits holder, 2 in 1 design for user convenience Comes with 10pcs Cr-Mo alloy steel precision bits and 10pcs S2 alloy 1/4”hex bits Bits with color-coded for easy identification and management Durable compact size storage box for easy bits collection and carrying Ideal for mobile phone, PDA, PC & other applications.