Apex Phillips bits, 1/4'' hex insert shank. Phillips bits from Apex Fastener Tools can be used for driving screws and fasteners with hand tools, corded or cordless power tools, and pneumatic tools. Phillips bits from Apex Fastener Tools formally Cooper Tools are popular throughout the aviation industry as well as automotive, heavy industry or anywhere quality tooling products are required. Apex Phillips bits are known worldwide for their quality construction and durability in demanding conditions.