diff --git a/callback.go b/callback.go
index d2f0cf04..a17fb2aa 100644
--- a/callback.go
+++ b/callback.go
@@ -5,7 +5,7 @@ import (
 )
 
 // defaultCallback hold default callbacks defined by gorm
-var defaultCallback = &Callback{}
+var DefaultCallback = &Callback{}
 
 // Callback contains callbacks that used when CURD objects
 //   Field `creates` hold callbacks will be call when creating object
diff --git a/callback_create.go b/callback_create.go
index 6316f9ee..314f505a 100644
--- a/callback_create.go
+++ b/callback_create.go
@@ -7,15 +7,15 @@ import (
 
 // Define callbacks for creating
 func init() {
-	defaultCallback.Create().Register("gorm:begin_transaction", beginTransactionCallback)
-	defaultCallback.Create().Register("gorm:before_create", beforeCreateCallback)
-	defaultCallback.Create().Register("gorm:save_before_associations", saveBeforeAssociationsCallback)
-	defaultCallback.Create().Register("gorm:update_time_stamp", updateTimeStampForCreateCallback)
-	defaultCallback.Create().Register("gorm:create", createCallback)
-	defaultCallback.Create().Register("gorm:force_reload_after_create", forceReloadAfterCreateCallback)
-	defaultCallback.Create().Register("gorm:save_after_associations", saveAfterAssociationsCallback)
-	defaultCallback.Create().Register("gorm:after_create", afterCreateCallback)
-	defaultCallback.Create().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
+	DefaultCallback.Create().Register("gorm:begin_transaction", beginTransactionCallback)
+	DefaultCallback.Create().Register("gorm:before_create", beforeCreateCallback)
+	DefaultCallback.Create().Register("gorm:save_before_associations", saveBeforeAssociationsCallback)
+	DefaultCallback.Create().Register("gorm:update_time_stamp", updateTimeStampForCreateCallback)
+	DefaultCallback.Create().Register("gorm:create", createCallback)
+	DefaultCallback.Create().Register("gorm:force_reload_after_create", forceReloadAfterCreateCallback)
+	DefaultCallback.Create().Register("gorm:save_after_associations", saveAfterAssociationsCallback)
+	DefaultCallback.Create().Register("gorm:after_create", afterCreateCallback)
+	DefaultCallback.Create().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
 }
 
 // beforeCreateCallback will invoke `BeforeSave`, `BeforeCreate` method before creating
diff --git a/callback_delete.go b/callback_delete.go
index 9db0666c..c8ffcc82 100644
--- a/callback_delete.go
+++ b/callback_delete.go
@@ -4,11 +4,11 @@ import "fmt"
 
 // Define callbacks for deleting
 func init() {
-	defaultCallback.Delete().Register("gorm:begin_transaction", beginTransactionCallback)
-	defaultCallback.Delete().Register("gorm:before_delete", beforeDeleteCallback)
-	defaultCallback.Delete().Register("gorm:delete", deleteCallback)
-	defaultCallback.Delete().Register("gorm:after_delete", afterDeleteCallback)
-	defaultCallback.Delete().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
+	DefaultCallback.Delete().Register("gorm:begin_transaction", beginTransactionCallback)
+	DefaultCallback.Delete().Register("gorm:before_delete", beforeDeleteCallback)
+	DefaultCallback.Delete().Register("gorm:delete", deleteCallback)
+	DefaultCallback.Delete().Register("gorm:after_delete", afterDeleteCallback)
+	DefaultCallback.Delete().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
 }
 
 // beforeDeleteCallback will invoke `BeforeDelete` method before deleting
diff --git a/callback_query.go b/callback_query.go
index 11f8b476..aa643557 100644
--- a/callback_query.go
+++ b/callback_query.go
@@ -8,9 +8,9 @@ import (
 
 // Define callbacks for querying
 func init() {
-	defaultCallback.Query().Register("gorm:query", queryCallback)
-	defaultCallback.Query().Register("gorm:preload", preloadCallback)
-	defaultCallback.Query().Register("gorm:after_query", afterQueryCallback)
+	DefaultCallback.Query().Register("gorm:query", queryCallback)
+	DefaultCallback.Query().Register("gorm:preload", preloadCallback)
+	DefaultCallback.Query().Register("gorm:after_query", afterQueryCallback)
 }
 
 // queryCallback used to query data from database
diff --git a/callback_update.go b/callback_update.go
index b71a47b4..287b927f 100644
--- a/callback_update.go
+++ b/callback_update.go
@@ -7,15 +7,15 @@ import (
 
 // Define callbacks for updating
 func init() {
-	defaultCallback.Update().Register("gorm:assign_updating_attributes", assignUpdatingAttributesCallback)
-	defaultCallback.Update().Register("gorm:begin_transaction", beginTransactionCallback)
-	defaultCallback.Update().Register("gorm:before_update", beforeUpdateCallback)
-	defaultCallback.Update().Register("gorm:save_before_associations", saveBeforeAssociationsCallback)
-	defaultCallback.Update().Register("gorm:update_time_stamp", updateTimeStampForUpdateCallback)
-	defaultCallback.Update().Register("gorm:update", updateCallback)
-	defaultCallback.Update().Register("gorm:save_after_associations", saveAfterAssociationsCallback)
-	defaultCallback.Update().Register("gorm:after_update", afterUpdateCallback)
-	defaultCallback.Update().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
+	DefaultCallback.Update().Register("gorm:assign_updating_attributes", assignUpdatingAttributesCallback)
+	DefaultCallback.Update().Register("gorm:begin_transaction", beginTransactionCallback)
+	DefaultCallback.Update().Register("gorm:before_update", beforeUpdateCallback)
+	DefaultCallback.Update().Register("gorm:save_before_associations", saveBeforeAssociationsCallback)
+	DefaultCallback.Update().Register("gorm:update_time_stamp", updateTimeStampForUpdateCallback)
+	DefaultCallback.Update().Register("gorm:update", updateCallback)
+	DefaultCallback.Update().Register("gorm:save_after_associations", saveAfterAssociationsCallback)
+	DefaultCallback.Update().Register("gorm:after_update", afterUpdateCallback)
+	DefaultCallback.Update().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
 }
 
 // assignUpdatingAttributesCallback assign updating attributes to model
diff --git a/dialects/mssql/mssql.go b/dialects/mssql/mssql.go
index 26bb38eb..03ad60fb 100644
--- a/dialects/mssql/mssql.go
+++ b/dialects/mssql/mssql.go
@@ -1,3 +1,17 @@
 package mssql
 
-import _ "github.com/denisenkom/go-mssqldb"
+import (
+	"fmt"
+
+	_ "github.com/denisenkom/go-mssqldb"
+	"github.com/jinzhu/gorm"
+)
+
+func setIdentityInsert(scope *gorm.Scope) {
+	scope.NewDB().Exec(fmt.Sprintf("SET IDENTITY_INSERT %v ON", scope.TableName()))
+}
+
+func init() {
+	gorm.DefaultCallback.Update().After("gorm:begin_transaction").Register("mssql:set_identity_insert", setIdentityInsert)
+	gorm.DefaultCallback.Create().After("gorm:begin_transaction").Register("mssql:set_identity_insert", setIdentityInsert)
+}
diff --git a/main.go b/main.go
index cfa71b60..46f35d01 100644
--- a/main.go
+++ b/main.go
@@ -64,7 +64,7 @@ func Open(dialect string, args ...interface{}) (*DB, error) {
 		db = DB{
 			dialect:   newDialect(dialect, dbSql.(*sql.DB)),
 			logger:    defaultLogger,
-			callbacks: defaultCallback,
+			callbacks: DefaultCallback,
 			source:    source,
 			values:    map[string]interface{}{},
 			db:        dbSql,