Chuck, Magnetic,1/4 inch (6.35mm) Hex Detent Drive. 7/32inch (5.5mm) Shank, Compatible with Stanley 'Yankee' and cloned Spiral Ratchet Screwdrivers #133, #135 and #233, #24K05.55
JOSEPH MARPLES - British made by JOSEPH MARPLES Tools in Sheffield. Head with brass wear strips. Solid beech construction. Marples classic half round head.