I am making a mod and for my pickaxe i would like it to mine a 3x3x3 if you have any ideas or you know the code please help! Here is my current code: 
[embed=425,349]package com.idtech.item; 
  
import com.idtech.BaseMod; 
  
import net.minecraft.creativetab.CreativeTabs; 
import net.minecraft.entity.EntityLiving; 
import net.minecraft.item.ItemPickaxe; 
import net.minecraft.item.ItemStack; 
import net.minecraft.util.BlockPos; 
import net.minecraft.world.World; 
  
public class ItemGelPickaxe extends ItemPickaxe { 
    
      public static final String name = "GelPickaxe"; 
      
            
      
        
    protected ItemGelPickaxe() { 
        super(ItemMod.toolMaterialGel); 
        // TODO Auto-generated constructor stub 
        setUnlocalizedName(BaseMod.MODID + "_" + name); 
        this.setCreativeTab(CreativeTabs.tabTools); 
    } 
  
    
    
        
        
    } 
    
    
    
     [/embed] 
  
Thanks, 
Charles (Java Town Owner)