The Vessel Tools 36-pc Bit-Replaceable Precision Screwdriver, No. 9836U, is made out of alloy steel that's gone through high-precision hardening and machining for added toughness. The grip surface is made out of hard anodized aluminum, and the screwdriver's strong magnet can both securely hold the replaceable bits as well as hold small screws. The tool comes in a locking storage case that can stand independently and display the bit holder for easy access.