طقم مثاقب، 29 قطعة، طول الوظيفة HSS

The 64ths sizing means I can drill a perfectly snug pilot hole for a 1/4"-20 tap, which is a nice touch. The metal case keeps everything organized and the bits haven't snapped on any of my home projects yet.

Drilled through a 3/8" steel plate with the 5/16" bit and it cut clean without wandering. The 64ths progression means I finally have the exact size I need instead of guessing between fractional bits. Case is solid enough to toss in a toolbox drawer without everything scattering.

The increment from 1/16" to 1/2" by 64ths means I finally have the exact bit I need without guessing. The metal index keeps everything organized and the jobber length gives good reach without being unwieldy.