Genuine Brass Laps For All Rifle & Handgun Barrels
Four different sizes of brass laps produce a beautiful, finished
crown on all pistol and rifle barrels when used with 600 grit silicon
carbide abrasive and your hand drill.
Big Book Catalog, Issue:66, Page:481
SPECS: Brass. 3" (7.62cm) long. Sets include (4) laps, one of each size.