Compatible Models

The Bosch 1 In. x 21 In. Spline Speed-X Rotary Hammer Bit - HC4051 is the correct replacement for the following model numbers.

Description

Bosch brings constant innovation to concrete and masonry drilling. Bosch developed custom-manufactured carbide and diffusion bonding technology to provide better performance and durability. Speed-X™ delivers high performance in precision anchoring and drilling applications.

Benefits
Tungsten-carbide tip provides superior wear resistance in tough applications
Narrow flute back for reduced friction between bit and material
Active-centering tip for optimum guidance when drilling in concrete and reinforced concrete
Inclined side cutters for aggressive drilling
Large flute volume for fast drilling, dust transport and less clogging

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