General description Ideal tool for removing the caliper plug from pre-1982 Triumph, Norton, and BSA disc brake calipers prior to refurbishment of pistons and seals. This tool helps prevent damage to the drive holes in the caliper plug due to the smooth pins. Technical specifications Two pin drive 3/8" D or 29mm socket Manufactured from Stainless Steel Other information This product is part of a range of tools for classic British motorcycles.