Check the listing for details. Sherlock® Marine Surveyor's Precision Percussion Sounding Hammer. Condition: New. Listed at 100.00 USD. Scientifically designed, rigorously field tested, engineered to get that "snap" the experienced marine surveyor is listening for, and made and patented in the USA, the Sherlock® precision percussion sounding hammer is an instrument that dramatically improves sensitivity, accuracy and productivity when inspecting vessels of all sizes for structural defects. Engineered by an inventor who pioneered medical and industrial ultrasound imaging decades ago, this is not simply a hammer, but a purpose-built tool for the experienced surveyor, designed to provide the concentrated, single wavefront energy delivery essential for percussion sounding of composite structures. Those who have tried a Sherlock® have become instant believers, with just the slightest wrist action they now hear things they have never heard so clearly or even at all, and thanks to the ease of use their technique changes, literally being able to "see" the internal structure using rapid-fire technique, external detection of detached bulkheads, the smallest areas of dry delamination, voids, things the moisture meter will be blind to. In short, like its famous detective namesake, Sherlock® will reveal clues that others cannot. Available in three standard sizes, 16", 20" and 26" as well as any custom order length between 10" and 26" the all-metal Sherlock® also features a powerful rare-earth magnet in the handle butt for confirming manifold or riser material or stainless steel grade... as well as retrieving tools or keys from the bilge, and a wrist lanyard to ease notetaking without having to set the instrument down. Designed with you in mind. For the largest of vessels, or for those who prefer tapping under hulls and atop decks without stooping or being upon bended knee, the 40" featherweight extended reach, "The Admiral", has become a top seller, users reporting cutting their hull inspection times in half or more, the larger the vessel the more dramatic the difference, yet retaining all the performance advantages of the all-metal designs but without the magnetic handle. Instead it features a carbon fiber shaft and is lighter than even the shortest metal model, yet despite the length enables the same effortless wrist action. It is a force multiplier for productivity.