Draper expert 1 4 square drive universal joint display pack draper expert 26846 b i expert quality i b manufactured from chrome vanadium steel hardened tempered chrome plated and polished for corrosion protection head swings through 90 176 in both directions spring loaded ball bearing for secure socket holding display packed br br b manufactured and tested generally in accordance with din3122 and iso3315 specifications b br br draper expert 26846 1 4 square drive univers