Must need for build - Wheeler Fine Gunsmith Equipment Delta Series AR Armorers Bench Block

I watched so many people break the ears of the lower when punching a trigger guard pin in. So for the little money for a block , it was worth the investment for a piece of mind knowing I would still have my ears left on the lower . The only bad thing having the block , I want to build so many more know . It really made making the lower so much easier !