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For bicycle-specific work, several professional tool companies make versions of the adjustable pin wrench (often called an adjustable pin spanner) tailored for delicate bike components. These are primarily used for servicing bottom brackets, cassettes, and specialized cranksets.Top Brands for Bicycle Pin Spanners:Park Tool (SPA-6): This is perhaps the most recognizable version in bike shops. It is "purpose-built" with 2.2mm hardened, replaceable pins designed to fit retaining rings on self-extracting cranksets and adjustable bottom bracket cups.Unior (253/2DP): A professional-grade option made from high-grade carbon steel. It often comes with interchangeable pins (typically 2.3mm and 2.8mm) to fit a wider variety of bicycle brands and models.Cyclus Tools: Another specialized brand that offers an adjustable face spanner specifically for mounting and dismounting bike sprockets and inner bearings.Why use a bicycle-specific one?While general-purpose pin wrenches for angle grinders look similar, bicycle-specific versions usually have smaller, precision-machined pins (around 2.2mm–2.9mm) and a more compact design to fit into tight spaces like a bottom bracket shell without damaging the parts.