The Topeak Plug’n Tool Mountain is a dual concealed tool system that fits neatly inside mountain bike handlebars, giving riders immediate access to two compact kits for quick on-trail repairs. One side features a 3.5mm plug insertion tool with three 3.5mm x 50mm tire plugs for tubeless puncture fixes, while the other side houses a 7-bit multitool with 3 / 4 / 5 / 6 / 10mm Allen keys, a T25 Torx bit, and a #2 Phillips bit. Crafted from hardened steel and engineering-grade polymer, both modules install securely into bar ends, keeping tools discreet, balanced, and rattle-free.