Product DescriptionEnsure precise timing of your muzzle device with the Yankee Hill Machine Co Barrel Shim Set. Designed for use with YHM .30 caliber Quick Detach muzzle brakes, this stainless steel shim kit features a 5/8 inch inner diameter to help correctly orient muzzle brakes and other timed devices on compatible barrels. The assortment of shim thicknesses allows fine adjustment to achieve perfect alignment.Product Highlights Optimizes timing and alignment for muzzle devices that require precise orientation Designed for YHM .30 caliber Quick Detach muzzle brakes; 5/8 inch inner diameter Durable stainless steel construction resists corrosion and wear Assorted shim thicknesses: 2x 0.002", 3x 0.005", 1x 0.020" Simple, reliable solution for achieving proper indexing on compatible barrels Specs Product Type: Barrel Shim Set Inner Diameter: 5/8 inch Included Thicknesses: 2x 0.002", 3x 0.005", 1x 0.020" Compatibility: YHM .30 caliber Quick Detach muzzle brakes Material: Stainless Steel Finish: Natural/Stainless UPC: 816701017656 Manufacturer Part Number: SHIM-3302-SET Brand Name: Yankee Hill Machine Co Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.