Lezyne Dual Insert Kit Bar-End Mount Multi Tool Tubeless Plug Tool BLKLezyne Dual Insert Kit Bar End Mount Multi Tool with Tubeless Plug Tool Black. The Dual Insert Kit is the ultimate stealth mounted mountain bike tool set featuring a pair of our innovative tools that discreetly and securely hide in the ends of a handlebar: the Tubeless Insert Kit and the Tool Insert Kit. Constructed of lightweight durable aluminum Bits are constructed of hardened steel Tubeless Insert Kit includes 5 high quality tubeless plugs Tool