Bosch Demolition Chisel HS1909-12 SDS-Max Shank 12 1/2 Inch Bushing Head Tool (1-3/4 Square 25-Tooth Forged Steel Concrete Roughening Leveling)

Bosch HS1909-12 12.5" SDS-Max 1-3/4" 25-Tooth One-Piece Concrete Bushing Tool

The Bosch HS1909-12 12.5-inch SDS-Max one-piece concrete bushing tool scabrifies hardened slab surfaces, knocks down raised seam joints, removes thick epoxy coatings, and textures mechanical bonding keyways prior to overlay applications. Engineered from a monolithic billet of drop-forged, heat-treated high-strength alloy tool steel, this heavy-duty texturing bit features an aggressive 1-3/4-inch square head packed with 25 precision-formed pyramid teeth to focus maximum kinetic impact energy without weld separation risks. Outfitted with an extended 12.5-inch total length that allows standing operators to work ground-level concrete with reduced lower-back bending, alongside full integration capability with the Bosch HDC300 extraction shroud for OSHA Table 1 silica compliance, it equips decorative concrete contractors, bridge deck rehabilitation crews, and commercial flooring installers with high-production aggregate profiling across all SDS-Max rotary hammers and demolition chipping guns set to hammer-only mode.

Best Used For:

• Concrete Slab Leveling and High-Spot Knockdown: Pulverizing raised expansion joints, excessive slab curl, and high spots on cured concrete flatwork to establish a level substrate.
• Mechanical Keyway Texturing and Profiling: Roughening smooth, power-troweled concrete floors to create an aggressive surface profile (CSP 3–5) for self-leveling underlayments, epoxy coatings, and cementitious overlays.
• Thick Chemical Coating and Mastic Removal: Fracturing and peeling stubborn waterproofing membranes, dried tile adhesives, traffic paint lines, and thick elastomeric toppings from concrete decks.

Key Performance & Safety Features

• Monolithic One-Piece Forging: Machined from a single block of alloy steel to eliminate welded head joints, preventing head detachment under severe percussive stress.
• Aggressive 25-Tooth Square Grid: 1-3/4" square head features 25 precision-machined pyramidal teeth to pulverize concrete scale and aggregate evenly in fewer passes.
• Extended 12.5-Inch Ergonomic Reach: Long shank design reduces operator stooping and fatigue during continuous slab preparation on floor surfaces.
• Universal SDS-Max Precision Shank: Slotted drive interface transfers full piston impact energy with minimal rotational slop in all standard SDS-Max chucks.
• OSHA Table 1 Silica Containment: Pairs seamlessly with the optional Bosch HDC300 dust-extraction shroud to capture airborne crystalline silica when connected to a HEPA vacuum.
• Impact-Hardened Alloy Steel Metallurgy: Specialized heat-treatment resists tooth rounding and shank fracturing during heavy demolition operations.

What's Included

• (1) Bosch HS1909-12 12.5" SDS-Max 1-3/4" 25-Tooth One-Piece Concrete Bushing Tool

Technical Specifications

Pro-Tip: When texturing concrete flatwork or knocking down high joints, keep the hammer perpendicular to the slab surface and move across the area in overlapping sweeping patterns; letting the tool's impact weight do the work prevents uneven gouging and ensures a uniform concrete surface profile.