BS 2559-5 74th Edition, October 31, 1974
Specification for Screwdrivers - Part 5: Spiral Ratchet Screwdrivers
Includes all amendments and changes through Amendment 1, August 29, 1975
Additional Comments: W/D S/S BY BS 2559
Published By:British Standards Institution (BSI)
Screwdrivers worked by a ratchet driven mechanism and spindle having a double spiral track operated by a reciprocating motion of the handle.