Answer BMX mini brake lever.

SPECS

• INTENDED BRAKE USE: Linear brakes
• REACH: 2.25″/57mm (reach adjustable to 2″/50.6mm)
• LEVERLENGTH: 2.25″/57mm, Single or Double finger
• ADJUSTMENT: Cable Barrel, adjustable reach
• MOUNTING: Pinch bolt, diameter fits regular 7/8″ bars (standard for BMXbars)
• MATERIAL: Forged aluminum lever and clamping body
• Right Hand lever only

Weight: 2.95oz/84g