Professional tool for commercial or occasional use. Flexible heads on either end which bend over 90 degrees, perfect to get into a confined space where rigid ratchets wont fit. Mechanism in the ring gear comprises of 72 teeth which gives you a 5 degree movement at each click. Highly polished mirror finish. Manufactured from chrome vanadium steel for strength and durability. Metric sizes. Set Includes; 1 x 8mm and 9mm spanner (total length 165mm) 1 x 10mm and 11mm spanner (total length 185mm) 1 x 12mm and 13mm spanner (total length 200mm) 1 x 14mm and 15mm spanner (total length 220mm) 1 x 16mm and 17mm spanner (total length 235mm) 1 x 18mm and 19mm spanner (total length 255mm) Complete in a canvas roll for easy storage and transportation.