This is a vintage STANLEY TOOLS #330 ratchet screwdriver set of 5 bits. These are for STANLEY driver #133H and 233H. These bits have a 7/32 shank diameter. The bits include a phillips screwdriver, a slotted screwdriver and a 5/64, 7/64 and a 9/64 drill bit. This is NOS and still in the store display blister pack. Parts are perfect.