Thumb Score: +7 Lowest price ever on Amazon. 72 tooth ratchet. Metric and SAE. Metric is 10 thru 19mm with only 16mm skip. The included 5/8 SAE is a substitute for the metric 16mm. Note: 16mm = 0.629 in and 5/8 = .625 in. Pass-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