The drift is approx. 11" long and tear drop shaped to form the hole needed to handle hammers, tomahawks etc. The tool measures 1/2 x 3/4 at the small end and tapers up to 7/8 x 1 1/4 at the large end. 
The tool is made of tough ductile iron. Made in the USA
Casting weighs approx.4 lbs. 
Item #: IM-TD