Cutter tool having removable teeth

A cutter tool comprising:

• a cutter blade having a cutting face, the cutting face having a plurality of spaced apart slots formed therein, each slot having opposed forward and rearward sidewalls;
• a tooth removably received in each said slot, each tooth having a top surface and opposed sidewalls, the tooth sidewalls being dimensioned to slidably engage said cutter head forward and rearward sidewalls as the tooth is positioned in a said slot, the tooth top surface having a cutting edge, wherein said sidewalls of each said slot are tapered towards each other in the direction away from said cutting face and wherein said sidewalls of each said tooth are tapered towards each other in the direction away from said top surface;
• a retention bar for each said tooth, each retention bar being of a width not greater than said cutting face and having a forward end and a rearward end, and
• means to releasably retain each said retention bar on said cutter blade cutting face whereby a said forward end of each said retention bar engages a said tooth top surface, each said tooth being retained in a said slot by frictional engagement of the sidewalls thereof with said slot sidewalls and by a said retention bar.