72 PCS 3/8″ Impact Socket Bit Set. Why Choose Our Impact Socket Set?. Socket Type: Impact Drive Type: 6 Point Drive Size: 3/8in. Number of Pieces: 72. Manufacturer Part Number: Impact Socket Set Unit Quantity: 72 Tools Included: Adapter,Extension,Sockets,Universal/Swivel,Extension Rods,1/4″ Adapter,1/2″ Adapter,Universal Joint Size: 8mm,9mm,10mm,11mm,12mm,13mm,14mm,15mm,16mm,17mm,18mm,19mm,21mm,22mm,5/16in.,3/8in.,7/16in.,1/2in.,9/16in.,5/8in.,11/16in.,3/4in.