"Challenge" Style Hollow Paper Drill Bit 1/4" diameter (.250) x 2.5" length of cut Brand new never used. Made in Germany of high quality tool steel. This drill bit fits most machines made by Challenge such as the MS-5, EH3A or MS-10 This bit has a 2.5" cutting length.
Handle ONLY! Threaded pin punch handle made from billet brass and designed exclusively for aircraft sheetmetal techs with access to 1/4-28 threaded drill bits. With this handle, simply take any 1/4-28 threaded drill bit, cut off the fluted portion and your in business.
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