The Grey Pneumatic 9772 Impact Master Set includes 72 pieces designed for versatility in automotive, industrial and equipment service work. The set features both standard and deep sockets in fractional sizes from 3/16 to 9/16 inch and metric sizes from 4mm to 15mm. Each socket uses a Surface Drive design that improves fastener engagement and reduces rounding under high torque loads. Accessories include a 3 inch extension, universal joint, 1/4 F x 3/8 M adapter and a 1/4 inch hex to 1/4 inch square drive adapter. Packaged in a low profile blow molded case, the set keeps tools organized and ready for professional use.