Servers

How to do that? This is my first mod.  

You have also to chain the method setRequiresTool to your block properties. if the method is not existing for you then please, refer to this post: https://forums.minecraftforge.net/topic/91282-1161-setrequirestool/

Version: 1.16.3 I have already added an block to my mod: the ruby block the code is following:   package com.jann.moreitemsmod.blocks; import net.minecraft.block.Block; import net.minecraft.block.SoundType; import net.minecraft.block.material.Material; import net.minecraftforge.common.ToolType; public class RubyBlock extends Block { public RubyBlock() { super(Block.Properties.create(Material.IRON) .hardnessAndResistance(5.0f, 6.0f) .sound(SoundType.METAL) .harvestLevel(3) .harvestTool(ToolType.PICKAXE) ); } } I have loaded my mod, and I can break the ruby block with each item, but I want, that everybody can break the ruby block with iron pickaxe, diamond pickaxe and netherite pickaxe.

That solved it! Thank you SO much, Danebi. My son will be thrilled in the morning. He's been sad without access to some of his worlds for a few weeks.

OH, I see the mods folder. Just delete that mod file?