1. High quality carbon steel material, durable and long service life 2. Plated chrome makes surface more smooth, do not hurt your hand 3. Waterproof and easy to use 4. High torque and allow you to span itme more tightly 5. 10 different head sizes: 5.5cm/7cm, 8cm/10cm, 10cm/12cm, 12cm/14cm, 14cm/17cm, 17cm/19cm, 19cm/22cm, 24cm/27cm, 27cm/30cm, 30cm/32cm
