diff --git a/godot/Levels/test_level.tscn b/godot/Levels/test_level.tscn
index b1687ae..70ee47b 100644
--- a/godot/Levels/test_level.tscn
+++ b/godot/Levels/test_level.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=17 format=3 uid="uid://c62s1jmtgajjk"]
+[gd_scene load_steps=24 format=3 uid="uid://c62s1jmtgajjk"]
 
 [ext_resource type="PackedScene" uid="uid://dsalxxq3xs842" path="res://rts_game_mode.tscn" id="1_4nchg"]
 [ext_resource type="Environment" uid="uid://cnfk8yrvklysq" path="res://Environments/default_environment.tres" id="2_jq6bw"]
@@ -38,6 +38,39 @@ size = Vector3(0.445312, 3, 40)
 [sub_resource type="BoxMesh" id="BoxMesh_4sjak"]
 size = Vector3(0.445, 5, 40)
 
+[sub_resource type="Goal" id="Goal_yju55"]
+desired_state_dict = {
+"is_target_activated": true
+}
+
+[sub_resource type="GDScript" id="GDScript_2bv87"]
+script/source = "extends UtilityLock
+
+func _on_finish_activate(_item: int, _unit: Unit):
+	self.queue_free()
+	self.get_parent().remove_child(self)
+"
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_pptgx"]
+radius = 1.22941
+
+[sub_resource type="BoxShape3D" id="BoxShape3D_3h2p0"]
+size = Vector3(6.10718, 2.48376, 1.63379)
+
+[sub_resource type="CylinderMesh" id="CylinderMesh_r0j0v"]
+top_radius = 1.0
+bottom_radius = 1.0
+height = 1.0
+cap_bottom = false
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_emsq8"]
+transparency = 1
+shading_mode = 0
+albedo_color = Color(0, 1, 0.823529, 0.760784)
+
+[sub_resource type="BoxMesh" id="BoxMesh_bl5l6"]
+size = Vector3(7, 1, 1)
+
 [node name="TestLevel" type="Level3D"]
 game_mode_prototype = ExtResource("1_4nchg")
 
@@ -219,6 +252,38 @@ transform = Transform3D(-4.37114e-08, 0, -1, 0, 1, 0, 1, 0, -4.37114e-08, -23.14
 [node name="ModernTrain6" parent="WorldEnvironment/NavigationRegion3D" instance=ExtResource("6_favl6")]
 transform = Transform3D(-4.37114e-08, 0, 1, 0, 1, 0, -1, 0, -4.37114e-08, -16.443, 0.268182, 3.2886)
 
+[node name="UtilityLock" type="UtilityLock" parent="WorldEnvironment"]
+allowed_items = [3]
+goal = SubResource("Goal_yju55")
+transform = Transform3D(0.0142588, 0, 0.999898, 0, 1, 0, -0.999898, 0, 0.0142588, -4.68514, 1.8999e-07, 2.96901)
+collision_layer = 4
+collision_mask = 0
+script = SubResource("GDScript_2bv87")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="WorldEnvironment/UtilityLock"]
+shape = SubResource("SphereShape3D_pptgx")
+
+[node name="StaticBody3D" type="StaticBody3D" parent="WorldEnvironment/UtilityLock"]
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="WorldEnvironment/UtilityLock/StaticBody3D"]
+transform = Transform3D(1, 0, 3.1664e-08, 0, 1, 0, -3.1664e-08, 0, 1, 0.0699434, 0.984067, -2.11005)
+shape = SubResource("BoxShape3D_3h2p0")
+
+[node name="NavigationObstacle3D" type="NavigationObstacle3D" parent="WorldEnvironment/UtilityLock/StaticBody3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.0515832, 0.0826392, -2.12334)
+height = 2.0
+vertices = PackedVector3Array(-1, 0, 3, -1, 0, -3, 1, 0, -3, 1, 0, 3)
+carve_navigation_mesh = true
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="WorldEnvironment/UtilityLock"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.136569, 0)
+mesh = SubResource("CylinderMesh_r0j0v")
+surface_material_override/0 = SubResource("StandardMaterial3D_emsq8")
+
+[node name="MeshInstance3D2" type="MeshInstance3D" parent="WorldEnvironment/UtilityLock"]
+transform = Transform3D(0.984294, -0.176535, 0, 0.176535, 0.984294, 0, 0, 0, 1, 0, 0.857907, -1.99146)
+mesh = SubResource("BoxMesh_bl5l6")
+
 [node name="Tracks" type="Node3D" parent="WorldEnvironment"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 7.25984)
 
diff --git a/src/register_types.cpp b/src/register_types.cpp
index 9f20d2b..c1c18fc 100644
--- a/src/register_types.cpp
+++ b/src/register_types.cpp
@@ -15,6 +15,7 @@
 #include "tank_unit.hpp"
 #include "unit.hpp"
 #include "unit_world_state.hpp"
+#include "utility_lock.hpp"
 #include "goap/action.hpp"
 #include "goap/action_db.hpp"
 #include "goap/actor_world_state.hpp"
@@ -64,6 +65,7 @@ void initialize_gdextension_types(gd::ModuleInitializationLevel p_level)
     GDREGISTER_RUNTIME_CLASS(EnemyWorldState);
     GDREGISTER_RUNTIME_CLASS(CharacterWorldState);
     GDREGISTER_RUNTIME_CLASS(GoalMarker);
+    GDREGISTER_CLASS(UtilityLock);
     GDREGISTER_RUNTIME_CLASS(Unit);
     GDREGISTER_RUNTIME_CLASS(TankUnit)
     GDREGISTER_RUNTIME_CLASS(CharacterUnit);
diff --git a/src/utility_lock.cpp b/src/utility_lock.cpp
new file mode 100644
index 0000000..55022b4
--- /dev/null
+++ b/src/utility_lock.cpp
@@ -0,0 +1,48 @@
+#include "utility_lock.hpp"
+#include "item_db.hpp"
+#include "utils/godot_macros.hpp"
+
+void UtilityLock::_bind_methods() {
+#define CLASSNAME UtilityLock
+    GDPROPERTY_HINTED(allowed_items, gd::Variant::ARRAY, gd::PROPERTY_HINT_ARRAY_TYPE, ItemDB::get_array_hint());
+    GDSIGNAL("begin_activate", gd::PropertyInfo(gd::Variant::INT, "with_item"), gd::PropertyInfo(gd::Variant::OBJECT, "by_unit", gd::PROPERTY_HINT_NODE_TYPE, "Unit"));
+    GDSIGNAL("finish_activate", gd::PropertyInfo(gd::Variant::INT, "with_item"), gd::PropertyInfo(gd::Variant::OBJECT, "by_unit", gd::PROPERTY_HINT_NODE_TYPE, "Unit"));
+}
+
+bool UtilityLock::can_use(Item const *with, Unit *by) const {
+    return this->allowed_items.has(with);
+}
+
+bool UtilityLock::begin_activate(Item const *with, Unit *by) {
+    if(this->can_use(with, by)) {
+        this->user = by;
+        this->emit_signal("begin_activate", with->get_id(), by);
+        this->_begin_activate(with, by);
+        return true;
+    } else return false;
+}
+
+bool UtilityLock::finish_activate(Item const *with, Unit *by) {
+    if(this->user != nullptr && this->user == by) {
+        this->user = nullptr;
+        this->emit_signal("finish_activate", with->get_id(), by);
+        this->_finish_activate(with, by);
+        return true;
+    } else return false;
+}
+
+void UtilityLock::set_allowed_items(gd::Array array) {
+    this->allowed_items.clear();
+    for(int i{0}; i < array.size(); ++i) {
+        Item const *item{ItemDB::get_item(array[i])};
+        if(item == nullptr || item->has_capability(ItemCapability::UtilityEquip))
+            this->allowed_items.insert(item);
+    }
+}
+
+gd::Array UtilityLock::get_allowed_items() const {
+    gd::Array array{};
+    for(Item const *item : this->allowed_items)
+        array.push_back(item == nullptr ? 0 : item->get_id());
+    return array;
+}
diff --git a/src/utility_lock.hpp b/src/utility_lock.hpp
new file mode 100644
index 0000000..f8ea7ea
--- /dev/null
+++ b/src/utility_lock.hpp
@@ -0,0 +1,28 @@
+#ifndef UTILITY_LOCK_HPP
+#define UTILITY_LOCK_HPP
+
+#include "goal_marker.hpp"
+#include "item.hpp"
+#include <godot_cpp/variant/utility_functions.hpp>
+#include <godot_cpp/templates/hash_set.hpp>
+
+namespace gd = godot;
+
+class UtilityLock : public GoalMarker {
+    GDCLASS(UtilityLock, GoalMarker)
+    static void _bind_methods();
+public:
+    bool can_use(Item const *with, Unit *by) const;
+    bool begin_activate(Item const *with, Unit *by);
+    bool finish_activate(Item const *with, Unit *by);
+    virtual void _begin_activate(Item const *with, Unit *by) {}
+    virtual void _finish_activate(Item const *with, Unit *by) {}
+
+    void set_allowed_items(gd::Array array);
+    gd::Array get_allowed_items() const;
+private:
+    gd::HashSet<Item const *> allowed_items{};
+    Unit *user{nullptr};
+};
+
+#endif // !UTILITY_LOCK_HPP