Overall length of the tool is 15"
13 U-shaped grooves- from 49mm to 5mm in diameter
5 V-grooves- from 29mm down to 6mm in diameter and all are 2" long
10 half-spheres-ideal for dapping - from 22mm down to 4mm in diameter.
Two shallow grooves, one on each end of the block; one is 28mm wide, the other is 49mm wide.
weighs 4.4kg.