Features: It is made of iron, durable and wear-resistant, and can be used for a long-time. Replacement string lock screws for Floyd Rose Tremolo Systems. Easy to install and replace. Screw size is about 6.8x42.4mm/0.27x1.67inch; The hole diameter is about 3mm/1.18inch. Package includes: 6x String Lock Screws. Specifications: Material: Iron Size: Approx. 6.8x42.4mm/0.27x1.67inch Hole Diameter: Approx. 3mm/1.18inch Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 6x String Lock Screws Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.