This is a Blue Point (manufactured by Snap-On) AT700C 3/8 Drive Air Ratchet from Japan. It features a 1/4 inch air inlet size and is designed for automotive use.
#av215 BLUE-POINT AT700C 3/8 DRIVE AIR RATCHET BROKEN - FOR PARTS
BLUE-POINT AT700C 3/8 DRIVE AIR RATCHET
BLUE-POINT SNAP-ON AT700C 3/8 DRIVE AIR RATCHET
Blue Point by Snap-On AT700C 3/8" Drive Air Ratchet
BLUE-POINT - SNAP-ON AT700C 3/8 DRIVE AIR RATCHET.