diff --git a/pkg/kubeapiserver/options/plugins.go b/pkg/kubeapiserver/options/plugins.go
index 6b63781117f..b96158f4b54 100644
--- a/pkg/kubeapiserver/options/plugins.go
+++ b/pkg/kubeapiserver/options/plugins.go
@@ -141,8 +141,8 @@ func RegisterAllAdmissionPlugins(plugins *admission.Plugins) {
 }
 
 // DefaultOffAdmissionPlugins get admission plugins off by default for kube-apiserver.
-func DefaultOffAdmissionPlugins() sets.String {
-	defaultOnPlugins := sets.NewString(
+func DefaultOffAdmissionPlugins() sets.Set[string] {
+	defaultOnPlugins := sets.New(
 		lifecycle.PluginName,                    // NamespaceLifecycle
 		limitranger.PluginName,                  // LimitRanger
 		serviceaccount.PluginName,               // ServiceAccount
@@ -165,5 +165,5 @@ func DefaultOffAdmissionPlugins() sets.String {
 		validatingadmissionpolicy.PluginName,    // ValidatingAdmissionPolicy, only active when feature gate ValidatingAdmissionPolicy is enabled
 	)
 
-	return sets.NewString(AllOrderedPlugins...).Difference(defaultOnPlugins)
+	return sets.New(AllOrderedPlugins...).Difference(defaultOnPlugins)
 }
diff --git a/staging/src/k8s.io/apiserver/pkg/server/options/admission.go b/staging/src/k8s.io/apiserver/pkg/server/options/admission.go
index d0334010fae..61085e94ebd 100644
--- a/staging/src/k8s.io/apiserver/pkg/server/options/admission.go
+++ b/staging/src/k8s.io/apiserver/pkg/server/options/admission.go
@@ -59,7 +59,7 @@ type AdmissionOptions struct {
 	// RecommendedPluginOrder holds an ordered list of plugin names we recommend to use by default
 	RecommendedPluginOrder []string
 	// DefaultOffPlugins is a set of plugin names that is disabled by default
-	DefaultOffPlugins sets.String
+	DefaultOffPlugins sets.Set[string]
 
 	// EnablePlugins indicates plugins to be enabled passed through `--enable-admission-plugins`.
 	EnablePlugins []string
@@ -91,7 +91,7 @@ func NewAdmissionOptions() *AdmissionOptions {
 		// after all the mutating ones, so their relative order in this list
 		// doesn't matter.
 		RecommendedPluginOrder: []string{lifecycle.PluginName, mutatingwebhook.PluginName, validatingadmissionpolicy.PluginName, validatingwebhook.PluginName},
-		DefaultOffPlugins:      sets.NewString(),
+		DefaultOffPlugins:      sets.Set[string]{},
 	}
 	server.RegisterAllAdmissionPlugins(options.Plugins)
 	return options
@@ -226,7 +226,7 @@ func (a *AdmissionOptions) Validate() []error {
 // EnablePlugins, DisablePlugins fields
 // to prepare a list of ordered plugin names that are enabled.
 func (a *AdmissionOptions) enabledPluginNames() []string {
-	allOffPlugins := append(a.DefaultOffPlugins.List(), a.DisablePlugins...)
+	allOffPlugins := append(sets.List[string](a.DefaultOffPlugins), a.DisablePlugins...)
 	disabledPlugins := sets.NewString(allOffPlugins...)
 	enabledPlugins := sets.NewString(a.EnablePlugins...)
 	disabledPlugins = disabledPlugins.Difference(enabledPlugins)
diff --git a/staging/src/k8s.io/apiserver/pkg/server/options/admission_test.go b/staging/src/k8s.io/apiserver/pkg/server/options/admission_test.go
index da600a5a3e4..3a4255e4355 100644
--- a/staging/src/k8s.io/apiserver/pkg/server/options/admission_test.go
+++ b/staging/src/k8s.io/apiserver/pkg/server/options/admission_test.go
@@ -28,7 +28,7 @@ import (
 func TestEnabledPluginNames(t *testing.T) {
 	scenarios := []struct {
 		expectedPluginNames       []string
-		setDefaultOffPlugins      sets.String
+		setDefaultOffPlugins      sets.Set[string]
 		setRecommendedPluginOrder []string
 		setEnablePlugins          []string
 		setDisablePlugins         []string
@@ -43,21 +43,21 @@ func TestEnabledPluginNames(t *testing.T) {
 		{
 			expectedPluginNames:       []string{"pluginB"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString("pluginA", "pluginC", "pluginD"),
+			setDefaultOffPlugins:      sets.New("pluginA", "pluginC", "pluginD"),
 		},
 
 		// scenario 2: use default off plugins and with RecommendedPluginOrder
 		{
 			expectedPluginNames:       []string{"pluginA", "pluginB", "pluginC", "pluginD"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString(),
+			setDefaultOffPlugins:      sets.Set[string]{},
 		},
 
 		// scenario 3: use default off plugins and specified by enable-admission-plugins with RecommendedPluginOrder
 		{
 			expectedPluginNames:       []string{"pluginA", "pluginB", "pluginC", "pluginD"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString("pluginC", "pluginD"),
+			setDefaultOffPlugins:      sets.New("pluginC", "pluginD"),
 			setEnablePlugins:          []string{"pluginD", "pluginC"},
 		},
 
@@ -65,7 +65,7 @@ func TestEnabledPluginNames(t *testing.T) {
 		{
 			expectedPluginNames:       []string{"pluginB"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString("pluginC", "pluginD"),
+			setDefaultOffPlugins:      sets.New("pluginC", "pluginD"),
 			setDisablePlugins:         []string{"pluginA"},
 		},
 
@@ -73,7 +73,7 @@ func TestEnabledPluginNames(t *testing.T) {
 		{
 			expectedPluginNames:       []string{"pluginA", "pluginC"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString("pluginC", "pluginD"),
+			setDefaultOffPlugins:      sets.New("pluginC", "pluginD"),
 			setEnablePlugins:          []string{"pluginC"},
 			setDisablePlugins:         []string{"pluginB"},
 		},
@@ -82,7 +82,7 @@ func TestEnabledPluginNames(t *testing.T) {
 		{
 			expectedPluginNames:       []string{"pluginA", "pluginB", "pluginC"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString("pluginD"),
+			setDefaultOffPlugins:      sets.New("pluginD"),
 			setAdmissionControl:       []string{"pluginA", "pluginB"},
 		},
 
@@ -90,7 +90,7 @@ func TestEnabledPluginNames(t *testing.T) {
 		{
 			expectedPluginNames:       []string{"pluginA", "pluginB", "pluginC"},
 			setRecommendedPluginOrder: []string{"pluginA", "pluginB", "pluginC", "pluginD"},
-			setDefaultOffPlugins:      sets.NewString("pluginC", "pluginD"),
+			setDefaultOffPlugins:      sets.New("pluginC", "pluginD"),
 			setAdmissionControl:       []string{"pluginA", "pluginB", "pluginC"},
 		},
 	}
@@ -208,7 +208,7 @@ func TestValidate(t *testing.T) {
 	for index, scenario := range scenarios {
 		t.Run(fmt.Sprintf("scenario %d", index), func(t *testing.T) {
 			options := NewAdmissionOptions()
-			options.DefaultOffPlugins = sets.NewString("pluginC", "pluginD")
+			options.DefaultOffPlugins = sets.New("pluginC", "pluginD")
 			options.RecommendedPluginOrder = []string{"pluginA", "pluginB", "pluginC", "pluginD"}
 			options.Plugins = &admission.Plugins{}
 			for _, plugin := range options.RecommendedPluginOrder {