MK Morse TA66 4-1/8" hole saw size, bulkAt The M.K. Morse Company we"ve had just one focus for over forty years ... make better saw blades and accessories and get them to customers on time. We don"t make machinery. We don"t make other products. We do one thing and we do it very well. This single-minded devotion has led to some unique innovations over the years. Mostly it has led to a relentless march to improve value.MK Morse TA66 4-1/8" hole saw size, bulk Features:; High speed hole saw with a handy, built-in arbor; Cut wood, plastic, or any machinable metal, including tool steel and stainless; Cuts materials up to 1-3/8" thick; For small diameter holes, or larger holes in light material; Can be used with 1/4" or 3/8" drills