Most multi tools try to pack as many functions as possible into a single body, which usually means a chunky sandwich of plates and pivots that barely fits in a jersey pocket. Park Tool's IB-2 I-Beam Multi Tool takes a different approach. The I-Beam handle design uses an aluminum center beam as the structural backbone, with steel tool bits folding out from each side. That central beam doubles as the grip, so you get a rigid, comfortable surface to push against when you're applying torque to a stubborn stem bolt or brake caliper fastener. It's a layout that keeps the overall footprint small without sacrificing leverage.

The IB-2 carries 10 tools that cover the hex sizes and driver types you're most likely to need mid-ride or in the garage. The hex wrench range runs from 1.5mm up to 8mm, which handles everything from derailleur limit screws to crankarm bolts. The T25 Torx driver takes care of disc brake rotor bolts, and the flat blade screwdriver covers older derailleur limit screws and miscellaneous fasteners. That's a practical selection for roadside adjustments to brakes, saddle position, handlebars, and derailleurs without carrying redundant bits you'll never touch.

At 75 x 40 x 18mm closed, the IB-2 fits inside a standard saddle bag alongside a tube and lever, or tucks into a jersey pocket without creating a noticeable bulge. The steel tool bits fold flush into the aluminum body when stowed, so nothing snags or pokes through fabric. If you're looking for a multi tool that covers the essentials and disappears into your kit when you're not using it, the IB-2 hits that mark without carrying the bulk or weight of chain-tool-equipped models.