Vim Tools HBR1046A Hex Dual Indexing Flex Head Bit Ratchet with Removable 1/4″ and 3/8″ Square Drive Adapters, 1/4″ Hex and 10 mm Hex. Vim Tools HBR1046A is a dual indexing flex head reversible bit ratchet with 1/4″ hex and 10 mm hex drive ends, designed for low profile access when tightening or loosening fasteners.