1Easy to Use: Easy adjustment, fine tuning brake, firm hold not slip. Easy to operate with quick installation and removement, 3x8 24speed, 3 speed for left hand, 8 speed for right hand. 2High Compatibility: Universal applicable handlebar diameter 22.2mm/0.9in, high adaptability; Support bidirectional up and down pull cable, high compatibility. Solid lead plate plating mirror chrome, bright, wear resistant, rust proof. 3Front Derailleur Shifter: H/L high and low position adjustment screw, precise adjustment to adjust the derailleur to the best working state. Able to adjust to ensure that the chain is between the largest and smallest pieces of the flywheel. H is high position and L is low, suitable for 423424T, 423222T three piece disc. 4Rear Derailleur Shifter: Has fine adjustment screw, H/L adjusting screw, fine adjustment screw tension screw, more accurate with small deformation. Tension screws, chain tension screws, effectively adjust the length of the chain to achieve the ideal speed change effect. Fine tuning knob, by rotating fine tuning knob to change the length of the line tube in a certain range, adjust the position of the flywheel and chain, solve the problem of teeth adjusting, up and down not fluent, chain abnormal ring. 5Compatible Speed: Medium long leg guide design has strong compatibility, has full compatibility of 8/9/10 speed mountain bikes. Item Type: Bike Speed Groupset Material: Aluminum Alloy + Steel + Plastic Application: For Mountain Bike Weight: Approx.791g/27.9oz Brake Lever Shifter Installation Diameter: 22.2mm/0.9in Dial Speed Brake Specification: 3x8 24speed Front Derailleur Front Derailleur Clamp Ring Inner Diameter: 30.8/31.8/34.9mm(1.2/1.3/1.4in) Application: Suitable For 42-34-24T, 42-32-22T 3Pcs Tooth Disc Front Derailleur Drawing Mode: Up/Down Front Derailleur Features: Light Weight, Accurate, Speed Sensitive, Multiple Clamp Rings Rear Derailleur Rear Derailleur Applicable Speed: 8/9/10 Speed Rear Pull Installation Mode: Direct Mounted Eye Dial (The Frame Shall Have Rear Dial Hook) Total Value Of Tooth Replacement After Extraction: 45 Teeth Rear Derailleur Features: Light Weight, Precision, High Strength, Mute Pulley Shifter Features: Brake And Speed Sensitive Response, Rapid Braking, Improve Riding Safety. 1 x Right Brake Lever Shifter 1 x Left Brake Lever Shifter 1 x Bicycle Front Derailleur Shifter 1 x Bicycle Rear Derailleur Shifter