Hazet 958 958-1 Bit adapter Drive (screwdriver) 1/2 (12.5 mm) Downforce 3/4 (20 mm) 50 mm 1 pc(s)

Square socket drive 12.5 = 1/2" · chrome vanadium · Surface: chrome-plated · DIN 3123, ISO 3316 · External square drive 20 = 3/4"

Price: 24.99 from Conrad Electronic