Specification: Material:metal silicon gel Color:as picture shown Pliers: approx 12.5x7.3 cm 4.92x2.87" Short crochet hook: approx 14.5 cm 5.71" Long crochet hook: approx 21 cm 8.27 " Outer diameter of hair extension ring: approx 5 mm 0.20 " Inner diameter of hair extension ring: approx 3 mm 0.12 " Hair extension ring height: about 3 mm 0.12" Package included: 1 PCS hair extension plier 1 PCS short crochet 1 PCS long crochet 100 PCS hair extension ringsIt is a necessary accessory for barbershop and a useful hair DIY tool, fit for most hair styles, a great helper for hair extension. There are 100 pcs silicone rings, practical with soft silicone lining, which allow you to install them to the head for maximum comfort. The heads of crochets are not easy to rust, with good performance. The pliers have a curved head and are easy to operate. Silicone hair extension ring does not damage the hair and will keep the hair firm.