diff --git a/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/OpenInventory.java b/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/OpenInventory.java
deleted file mode 100644
index ff2259a..0000000
--- a/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/OpenInventory.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.willfp.talismans.proxy.v1_15_R1;
-
-import com.willfp.talismans.proxy.proxies.OpenInventoryProxy;
-import org.bukkit.craftbukkit.v1_15_R1.entity.CraftPlayer;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-
-public final class OpenInventory implements OpenInventoryProxy {
-    @Override
-    public Object getOpenInventory(@NotNull final Player player) {
-        return ((CraftPlayer) player).getHandle().activeContainer;
-    }
-}
diff --git a/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/Skull.java b/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/Skull.java
index a575633..92ee441 100644
--- a/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/Skull.java
+++ b/eco-core/core-nms/v1_15_R1/src/main/java/com/willfp/talismans/proxy/v1_15_R1/Skull.java
@@ -10,7 +10,7 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.UUID;
 
-public class Skull implements SkullProxy {
+public final class Skull implements SkullProxy {
     /**
      * Cached method to set the gameProfile.
      */
diff --git a/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/OpenInventory.java b/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/OpenInventory.java
deleted file mode 100644
index 0debcc0..0000000
--- a/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/OpenInventory.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.willfp.talismans.proxy.v1_16_R1;
-
-import com.willfp.talismans.proxy.proxies.OpenInventoryProxy;
-import org.bukkit.craftbukkit.v1_16_R1.entity.CraftPlayer;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-
-public final class OpenInventory implements OpenInventoryProxy {
-    @Override
-    public Object getOpenInventory(@NotNull final Player player) {
-        return ((CraftPlayer) player).getHandle().activeContainer;
-    }
-}
diff --git a/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/Skull.java b/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/Skull.java
index 6bc6f73..5d391f9 100644
--- a/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/Skull.java
+++ b/eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/talismans/proxy/v1_16_R1/Skull.java
@@ -10,7 +10,7 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.UUID;
 
-public class Skull implements SkullProxy {
+public final class Skull implements SkullProxy {
     /**
      * Cached method to set the gameProfile.
      */
diff --git a/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/OpenInventory.java b/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/OpenInventory.java
deleted file mode 100644
index 54fc94f..0000000
--- a/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/OpenInventory.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.willfp.talismans.proxy.v1_16_R2;
-
-import com.willfp.talismans.proxy.proxies.OpenInventoryProxy;
-import org.bukkit.craftbukkit.v1_16_R2.entity.CraftPlayer;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-
-public final class OpenInventory implements OpenInventoryProxy {
-    @Override
-    public Object getOpenInventory(@NotNull final Player player) {
-        return ((CraftPlayer) player).getHandle().activeContainer;
-    }
-}
diff --git a/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/Skull.java b/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/Skull.java
index 5b841ec..a577b8f 100644
--- a/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/Skull.java
+++ b/eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/talismans/proxy/v1_16_R2/Skull.java
@@ -10,7 +10,7 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.UUID;
 
-public class Skull implements SkullProxy {
+public final class Skull implements SkullProxy {
     /**
      * Cached method to set the gameProfile.
      */
diff --git a/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/OpenInventory.java b/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/OpenInventory.java
deleted file mode 100644
index 817cf85..0000000
--- a/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/OpenInventory.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.willfp.talismans.proxy.v1_16_R3;
-
-import com.willfp.talismans.proxy.proxies.OpenInventoryProxy;
-import org.bukkit.craftbukkit.v1_16_R3.entity.CraftPlayer;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-
-public final class OpenInventory implements OpenInventoryProxy {
-    @Override
-    public Object getOpenInventory(@NotNull final Player player) {
-        return ((CraftPlayer) player).getHandle().activeContainer;
-    }
-}
diff --git a/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/Skull.java b/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/Skull.java
index 32a686c..d0ea92d 100644
--- a/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/Skull.java
+++ b/eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/talismans/proxy/v1_16_R3/Skull.java
@@ -10,7 +10,7 @@ import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.UUID;
 
-public class Skull implements SkullProxy {
+public final class Skull implements SkullProxy {
     /**
      * Cached method to set the gameProfile.
      */
diff --git a/eco-core/core-proxy/src/main/java/com/willfp/talismans/proxy/proxies/OpenInventoryProxy.java b/eco-core/core-proxy/src/main/java/com/willfp/talismans/proxy/proxies/OpenInventoryProxy.java
deleted file mode 100644
index 1bb06e9..0000000
--- a/eco-core/core-proxy/src/main/java/com/willfp/talismans/proxy/proxies/OpenInventoryProxy.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.willfp.talismans.proxy.proxies;
-
-import com.willfp.eco.util.proxy.AbstractProxy;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-
-public interface OpenInventoryProxy extends AbstractProxy {
-    /**
-     * Get the NMS inventory container for a player's inventory view.
-     * @param player The player to query.
-     * @return The NMS inventory container.
-     */
-    Object getOpenInventory(@NotNull Player player);
-}