UNIVERSAL ADJUSTABLE WRENCH 5 - 27 mm METRIC AND SAE . INCREDIBLE FOR REMOVING ROUNDED BOLTS. DEALING WITH A ROUNDED RUSTY OR PAINTED BOLT WILL NOT BE DIFFICULT AGAIN.FORGED CHROME VANADIUM STEEL. JAW OPENING: 7 - 22 mm MM (9/32"- 7/8") NON-SLIP TEXTURE. ROTATE TO ADJUST SIZE