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Product Details

Fuller Step Drills are designed for making countersinks for round head fasteners. These high speed steel drills have an 82 degree angled step and can drill and countersink in one operation. They cut wood, plastic, and metal.

They are also a time saver as they drill both the root diameter and the shank of a fastener at the same time. A step drill is defined as a multiple diameter drill with one set of drill lands which are ground to different diameters. High speed steel standard step drills can also be used for drilling holes for socket-head screws.

Tech Specs
Part Number Screw Size Major Dia. Minor Dia. Pilot Length Flute Length
SD223/16.0903/161-1/8
SD337/32.1033/161-1/4
SD4415/64.1163/161-5/16
SD5517/64.1291/41-7/16
SD6619/64.1421/41-9/16
SD7721/64.1551/41-11/16
SD8811/32.1681/41-11/16
SD993/8.1821/41-13/16
SD101013/32.1951/41-15/16
SD121229/64.2215/162-1/8
SD14141/2.2555/162-1/4
SD16169/16.2865/162-1/2
SD185/165/8.3173/82-1/2
SD202011/16.3283/82-1/2
SD243/83/4.3803/82-1/2
Part Number Overall Length Shank Size
SD22-3/163/16
SD32-3/87/32
SD42-7/1615/64
SD52-5/81/4
SD62-3/41/4
SD72-15/161/4
SD831/4
SD93-1/83/8
SD103-5/163/8
SD123-9/163/8
SD143-3/41/2
SD1651/2
SD1851/2
SD2051/2
SD2451/2