TOPDC 1 Gauge 25 Feet Jumper Cables are well-constructed with solidly built heavy-duty clamps, and made of high quality raw material. All these small details make TOPDC jumper cables remain flexible even in extreme weathers like -40℉/-40℃. Forget the manual, and just follow our step guide label, connection has never been so simple like today. Also, this includes a durable carry bag which makes it convenient to store and keep your trunk clean and tidy.