The Bosch OSL234HG is a 2-3/4 inch, Starlock‑mount oscillating blade aimed at grout removal, tile prep, and abrasive tasks where durability and fast material removal matter. The outer edge of the blade is coated with premium carbide grit, giving it long life when grinding or rasping through grout, thinset, or damaged tile. Its hybrid teardrop shape lets you use it for both grinding and rasping, offering more versatility than a strictly single‑purpose tooth or blade design.

Built to Bosch’s Starlock standard, the blade benefits from a three‑dimensional interface for stronger torque transfer, reduced vibration, and quick tool‑free blade changes. Bosch notes Starlock accessories fit a broad set of tools, providing high‑performance compatibility. This particular variant is a Swiss‑made accessory, designed for professional accuracy and longevity in demanding use.      

Technical Specs

• Brand: Bosch
• Model Number: OSL234HG
• Mount: Starlock
• Blade width: 2.75 in.
• Immersion depth: 1.5 in.
• Material / grit: Carbide RIFF grit abrasive
• Pack quantity: 1 blade
• Fit: Works with oscillating multi‑tools of most brands, leveraging Starlock’s high‑torque interface.    
• Made in: Switzerland (Swiss made)
• Primary use: Grout removal, grinding, and abrasive surface prep on tiles and similar materials

What It’s Good For

• Removing old or damaged grout quickly from between ceramic, porcelain, and stone tiles, especially in tight corners or along edges where a blade must be precise and durable.
• Tile prep and edging where light grinding or rasping is needed to clean or reshape surfaces before reinstalling tile or applying new grout.
• General abrasive cleanup on hard surfaces, including thinset cleanup or removing hardened residues from masonry or tile substrates.
• Professional or frequent use thanks to the carbide grit’s long life, which reduces downtime swapping blades during multi‑day jobs.

Compared to Other Blades

• Vs. tooth‑style grout blades: The carbide grit edge in the OSL234HG provides longer life and more even abrasion, making it better for extended grinding tasks rather than only scoring or chopping.
• Vs. non‑Starlock blades: Starlock’s three‑dimensional interface aims for improved torque transfer and stability, reducing vibration and allowing higher performance—useful when working harder materials or at higher speeds.  
• Vs. very small or specialty blades: The 2-3/4 inch width balances reach and control; it is wider than tiny detail blades for fine corners but still manageable in tight areas, offering a useful middle ground for most grout and tile prep needs.

Also Known As

• Bosch OSL234HG hybrid grout & abrasive Starlock blade
• Bosch 2.75 in. Starlock carbide grout blade
• Starlock hybrid grout blade for oscillating multi‑tools
• Bosch Swiss‑made Starlock abrasive blade