package net.remew.LanceOfLonginusMod.items;

import net.minecraft.item.Item;
import net.remew.LanceOfLonginusMod.LanceOfLonginusMod;

public class ItemLanceOfLonginus extends Item
{

	public ItemLanceOfLonginus(int par1)
	{
		super(par1);
		this.setCreativeTab(LanceOfLonginusMod.creativeTab);
		this.setUnlocalizedName("LanceOfLonginus");
		this.setTextureName("llmod:Icon_LanceOfLonginus");
	}
}

package net.remew.LanceOfLonginusMod.items;

import net.minecraft.item.Item;
import net.remew.LanceOfLonginusMod.LanceOfLonginusMod;

public class ItemLanceOfLonginus extends Item
{

	public ItemLanceOfLonginus(int par1)
	{
		super(par1);
		this.setMaxStackSize(1);
		this.setCreativeTab(LanceOfLonginusMod.creativeTab);
		this.setUnlocalizedName("LanceOfLonginus");
		this.setTextureName("llmod:Icon_LanceOfLonginus");
	}
}

Change max stack size.