Milwaukee Tool 48-89-2802 29PC THUNDERBOLT Black Oxide Drill Bit Set

The 48-89-2802 THUNDERBOLT black oxide set is built for metal, wood, and plastics, with a 135 degree split point tip and parabolic flutes for chip clearing in those materials. For concrete and masonry you want a hammer-rated bit instead, such as the Minerallac 59736 Relton 1/2 inch x 6 inch carbide-tipped rotary/percussion drill bit, which is made to run in percussion mode. Black oxide twist bits are not intended for percussion work.

Each Thunderbolt bit has a 3-FLAT SECURE-GRIP shank, which is the three flats ground into the shank so the chuck jaws bite instead of spinning on a round shank. That is the feature that matters when you lean on a bit in steel with a keyless chuck.

Yes. The 29-piece Thunderbolt set ships in a customizable accessory case built for use in PACKOUT, so it drops into a PACKOUT stack rather than riding loose in the van.

A 135 degree split point self-centers, so the bit starts where you put it without walking and without a center punch. On the Thunderbolt set that pairs with a parabolic flute form to pull chips out fast, which keeps heat down when you are drilling a run of holes in steel.

It fits that work. The 29-piece Thunderbolt set is an electrical-department general drilling set for metal, wood and plastics, run off a cordless drill driver. A thicker core resists breaking, which is what usually kills small bits in enclosure and strut work. For large diameter openings in panel doors you would still reach for a hole saw or step bit instead.

Abrasive hard materials call for a diamond grit bit rather than a black oxide twist bit. The Lenox 12111-10DGHS is a 5/8 inch diamond grit drill bit in the D/S-10Dg series, which cuts by abrasion instead of the cutting lip geometry used by the 48-89-2802 THUNDERBOLT bits. The Milwaukee set is aimed at metal, wood, and plastics.

If the job is one hole in one material, a single bit covers it: the Lenox 12111-10DGHS is a single 5/8 inch diamond grit bit, and the Minerallac 59736 is a single 1/2 inch x 6 inch carbide-tipped rotary/percussion bit. The Milwaukee 48-89-2802 is a 29-piece black oxide set with a customizable case designed for use in PACKOUT, which suits a crew carrying a full range of sizes for metal, wood, and plastic work.

No. The 48-89-2802 THUNDERBOLT bits are designed for use with drill drivers and use a 3-FLAT SECURE-GRIP shank to keep the bit from slipping in a chuck. A percussion bit such as the Minerallac 59736 Relton carbide-tipped rotary/percussion bit is the one built for hammering action. Running black oxide twist bits under percussion is outside what they are made for.

Order it as Milwaukee 48-89-2802. That is the single model covering the 29-piece Thunderbolt black oxide twist bit set, so there is no size or finish choice to specify.