LOT of 10 AMEC  
Spade Drill Bit Insert  Cutter  2-1/8" (D)  
pat.- 3460409

Are you kidding!!   This is an awesome unit that will rip through about anything.  Insert this and rip.    high production type. 
Some of this lot are WC TLS and most are AMEC.  All are 2-1/8".  3 of the 10 are not waxed dipped the rest are and sharp.  
 
2-1/8"

Normal wear, but will work or money back.      ......  

Please ask questions.    FREE USA Shipping on this heavy stuff.  Will ship international