Description: 【Product Name】: Chainring Bolt Nut Wrench Chainring Screw Removal Install Tool Mountain Road Folding Bike Chainwheel Tool 【Material】: The Chainring Screw Tool is made of stainless steel, sturdy and durable, and will not rust. 【Function】: Fix the chainring slotted nut from 1 side of the slot, and remove the locking chainring screw from the other side with the Allen wrench. 【Application】: This bicycle chainring tool fits most slotted nuts and provides better leverage. As long as the groove width of the chainring screw is not less than 1.3mm. 【Easy to Use】: It securely holds the slotted nut against rotation when tightening or loosening the bolt. Makes installation and removal easy. Specification: Material: Stainless Steel Size Chart: 77.4mmx29mm/3.05inchx1.14inch Package Includes: 1 Chainring Bolt Tool(2 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!