data merge entity @s {drop_chances:{mainhand:1f}}
data modify entity @s equipment.mainhand set value {id:diamond_pickaxe,components:{custom_data:{minerpick:tag},rarity:uncommon,item_name:{"text":"Miner's Pickaxe","italic":false},lore:[{"text":"Gain speed boost when walking on stone type blocks","italic":false,"color":"gray"}],attribute_modifiers:[{type:"mining_efficiency",amount:.4,slot:mainhand,id:"12723901423427310",operation:add_multiplied_base},{type:"mining_efficiency",amount:10,slot:mainhand,id:"0172637182312-7318",operation:add_value},{type:"attack_damage",amount:4,slot:mainhand,id:"-237182769813691",operation:add_value},{type:"attack_speed",amount:-2.6,slot:mainhand,id:"32671892601-217389",operation:add_value}]}}