diff --git a/etk/tool.cpp b/etk/tool.cpp
index dc1525a..1e1c7d0 100644
--- a/etk/tool.cpp
+++ b/etk/tool.cpp
@@ -14,13 +14,20 @@
 #include <unistd.h>
 #include <stdlib.h>
 
-float etk::tool::frand(float _a, float _b)
+double etk::tool::frand(double _a, double _b)
 {
-	return ( rand()/(float)RAND_MAX ) * (_b-_a) + _a;
+	return (float)(( (double)rand()/(double)RAND_MAX ) * ((double)_b-(double)_a) + (double)_a);
 }
 
-
 int32_t etk::tool::irand(int32_t _a, int32_t _b)
 {
-	return (int32_t)(( rand()/(float)RAND_MAX ) * ((float)_b-(float)_a) + (float)_a);
+	return (int32_t)(( rand()/(double)RAND_MAX ) * ((double)_b-(double)_a) + (double)_a);
+}
+
+void etk::tool::resetRandom(void) {
+	srand(time(NULL));
+}
+
+void etk::tool::randSeek(int32_t _val) {
+	srand(_val);
 }
diff --git a/etk/tool.h b/etk/tool.h
index 7de11c0..049d1b3 100644
--- a/etk/tool.h
+++ b/etk/tool.h
@@ -13,8 +13,24 @@
 
 namespace etk {
 	namespace tool {
-		float   frand(float _a, float _b);
+		/**
+		 * @brief Get a random value in a specific range.
+		 * @param[in] _a Lower value of the random.
+		 * @param[in] _b Bigger value of the random.
+		 * @return Random Value between [_a and _b]
+		 */
+		double frand(double _a, double _b);
+		//! @previous
 		int32_t irand(int32_t _a, int32_t _b);
+		/**
+		 * @brief Reset the random system with a random value (time).
+		 */
+		void resetRandom(void);
+		/**
+		 * @brief Reset the random system with The specify value.
+		 * @param[in] _val Seek value for the pseudo random system.
+		 */
+		void randSeek(int32_t _val);
 	};
 };