Product Description
Milwaukee 3/8 in. x 6 in. MX4 SDS+ Carbide Drill Bit
Model Number: 48-20-7351
The Milwaukee 48-20-7351 is a 3/8 in. diameter x 4 in. flute length x 6 in. overall length MX4 SDS+ Carbide Drill Bit — Milwaukee's premium four-cutter configuration at the 3/8 in. diameter, one of the most heavily used anchor drilling sizes in commercial concrete construction. The MX4 four-cutter tip uses four active carbide cutting edges per revolution versus the two-cutter standard of conventional SDS+ bits, delivering faster penetration rate by doubling the cutting contacts per revolution and distributing cumulative carbide wear across twice the surface area for proportionally extended bit life. The 3/8 in. diameter covers wedge anchors, sleeve anchors, drop-in anchors, and epoxy anchor systems used for structural connections, conduit support, equipment mounting, and general concrete fastening throughout commercial and industrial construction — it is among the highest-volume anchor drilling diameters on commercial projects, where the MX4 performance advantage delivers the most accumulated value in reduced drilling time and bit replacement frequency.
The MX4 performance advantage in hard commercial concrete is most significant at the 3/8 in. diameter — the four cutting contacts maintain consistent penetration momentum through hard aggregate encounters where two-cutter bits experience more noticeable slowdowns, and the doubled carbide wear distribution extends bit life noticeably in the high-strength concrete specified for structural connections where 3/8 in. anchors are most commonly used. The 6 in. overall length with 4 in. flute is the standard compact configuration appropriate for most commercial anchor embedment depths and ceiling penetrations where the required hole depth is within the 4 in. working length. The SDS+ shank provides tool-free engagement in all SDS+ rotary hammers for fast bit changes during production anchor drilling.
See Milwaukee's complete MX4 SDS+ lineup for extended lengths at 3/8 in. and for all other diameters where the four-cutter performance advantage is available — including bulk pack quantities for high-volume users.
Features
- MX4 four-cutter tip — faster speed and longer life vs. standard 2-cutter SDS+ bits
- 3/8 in. diameter — highest-volume commercial anchor size where MX4 delivers most value
- Four cutting edges double contacts per revolution for consistent penetration in hard concrete
- 6 in. overall length for standard anchor embedment depths and ceiling penetrations
- SDS+ shank for tool-free engagement on all SDS+ rotary hammers
Specifications
- Diameter: 3/8 in.
- Flute Length: 4 in.
- Overall Length: 6 in.
- Tip: MX4 4-Cutter Carbide
- Shank: SDS+
Includes
- (1) Milwaukee 48-20-7351 3/8 in. x 6 in. MX4 SDS+ Carbide Drill Bit
