Spotweld Pilot, Manufacturer suggested retail price.$5.50 Features and Benefits: "13,000-Series" Blaircutters provide economy and quality. Fast, accurate, burr-free holes for materials up to 3/16" thick in seven sizes for 1/4" and larger drill chucks. Spring loaded pilot "pops" the slug from the cutter. Three to a package Manufacturer: Blair 1 yr warranty on material and workmanship