Dirt and rock cutting bit tool

An improved dirt and rock cutting tool assembly which substantially prevents rotation of the dirt and rock cutting tool relative to the assembly, said dirt and rock cutting tool assembly comprising:

• a tool bit having a first planar shoulder and a shank having a first diameter extending from the first planar shoulder of the tool bit, the shank having a terminal end defining a second diameter smaller than the first diameter, the terminal end defining a second planar shoulder at the interface of the first and second diameters, the terminal end having a threaded bore member disposed at an end thereof;
• a bit block for receiving said tool bit, said bit block including a receiver defined by a bore having a first portion dimensioned to receive the first diameter and a second portion dimensioned to receive the second diameter, said receiver extending through a length of said bit block, the bit block being configured such that a bolt can be configured to be threadably received by said threaded bore member and such that the bolt can be rotationally tightened against the bit block to secure the tool bit to the bit block;
• and
• at least one pin member carried by at least one of said first planar shoulder and said second planar shoulder, the at least one pin member being configured to engage and bite into at least a portion of said bit block when the tool bit is secured to the bit block by rotationally tightening the bolt against the bit block to restrict rotational movement of said tool bit in relation to said bit block.