According to the Sweeney Operating Instructions Manual (see photos 4 & 5), this special tool is made to hold the Prop Shaft on #40 Spline such as Pratt & Whitney R-1340 and Curtiss Wright R-1300 Aircraft Engines while removing a tight Thrust Nut. The tool is 15” long x 4-1/2” wide x 3-3/8” deep. It has a 1” diameter hole in the end which can be used for an extension handle and using it as a turning bar.

Even though item is in New Surplus condition, buyer is responsible to make sure that this part will work for their application as there is no warranty or guarantee expressed or implied.