Mechanic's Tool Set, 25 Pcs, 3/8" Drive SizePass Thru socket and ratchet system eliminates the need for deep sockets Fits six fastener types: Hex, Square, 12 pt., E Torx, Rounded Hex, and Spline Ratchet has just a 5 swing arc, so it can turn fasteners in very tight spaces Up to 50% thinner than standard ratchets to give you greater access Up to 40% stronger than standard ratchets Pass Thru system works over any length threaded rod, where normal ratchets and sockets won't fit Meets or exceeds