From Dark and Darker Wiki

loot_drop_groups
order
"0"
"1023"
"2023"
"3023"
"4023"
"5023"
data
0
loot_drop_id"Id_Lootdrop_Item_SkullKey"
drop_rate_id"ID_Droprate_SkullKey"
roll_count1
1023
loot_drop_id"Id_Lootdrop_Item_SkullKey"
drop_rate_id"ID_Droprate_SkullKey_1023"
roll_count1
2023
loot_drop_id"Id_Lootdrop_Item_SkullKey"
drop_rate_id"ID_Droprate_SkullKey_2023"
roll_count1
3023
loot_drop_id"Id_Lootdrop_Item_SkullKey"
drop_rate_id"ID_Droprate_SkullKey_3023"
roll_count1
4023
loot_drop_id"Id_Lootdrop_Item_SkullKey"
drop_rate_id"ID_Droprate_SkullKey_4023"
roll_count1
5023
loot_drop_id"Id_Lootdrop_Item_SkullKey"
drop_rate_id"ID_Droprate_SkullKey_5023"
roll_count1
loot_drops
Id_Lootdrop_Item_SkullKey
items_per_luck_grade
01
61
items_order
"Lockpick"
"Skull Key"
items_data
Lockpick
luck_grade0
rarity2
count1
Skull Key
luck_grade6
rarity7
count1
drop_rates
ID_Droprate_SkullKey
01
ID_Droprate_SkullKey_1023
01
ID_Droprate_SkullKey_2023
00.995
60.005
ID_Droprate_SkullKey_3023
00.9
60.1
ID_Droprate_SkullKey_4023
00.9
60.1
ID_Droprate_SkullKey_5023
00.995
60.005