Apex slotted bits, 14'' hex insert bits. Slotted bits from Apex Fastener Tools can be used for driving screws and fasteners with power tools, hand tools and pneumatic tools. Apex offers a wide selection of slotted bits, which are popular throughout the aviation industry as well as automotive, heavy industry or anywhere quality tooling products are required. The Apex tool brand, formally known as Cooper Tools, is known worldwide for its' quality construction and durability in demanding conditions.