A double-ended wrench for notched lockrings commonly found on adjustable cup-and-cone bottom brackets.
Park Tool (109917) HCW-5 Lock Spanner : Bike Hand Tools : Sports & Outdoors
Bottom Bracket Tool, Strong Firm Steel Rubber Bicycle Bottom Bracket Wrench Lightweight Practical Wrench Remover for Cycling Repairment Bicycle Repair Hardware Tools : Sports & Outdoors
Bottom Bracket Tool Selection: Threaded and…
Bottom Bracket Service: Adjustable Cup-and-Cone
29mm distance between pins on spanner end Pin diameter is nominally 2.3mm
PARK TOOL (109916) HCW-4 Box End and Pin Spanner Crank Wrench (36mm)
MATINA Bottom Bracket Tool, Bike Bottom Bracket Wrench, Bike Bottom Bracket Removal Tool, Double Sided Bottom Bracket Lock Wrench for Bicycle : Sports & Outdoors
Acxico 1Pcs Bike Lock Ring Remover Bottom Bracket Lock Ring Removal Repair Tool Bicycles Tail Lock Hook Spanners Multifunctional Wrench : Sports & Outdoors
Bottom Bracket Service: Adjustable Cup-and-Cone
Park Tool HCW-17 Fixed Gear Lockring Wrench
Park Tool BBT-22 Bottom Bracket Tool 20-Spline Shimano ISIS Drive – SprocketKings
Trouble figuring out what tools I need to take apart this bottom
HCW-5 Bottom Bracket Wrench — Cup-and-Cone Lockring
Bottom Bracket Service: Adjustable Cup-and-Cone
Bottom Bracket Tools - Evolution Cycle Shop