1、Clear Threads: Designed to have clear thread and smooth knob as well the working operation is not easy to get stuck. 2、Practical Use: Suits perfectly for MS380 MS381 038 chain saw not likely to have broken shank very reliable. 3、Reliable Work: Comes with large bearing capacity which will prevent slipping and ensure firm clamping for efficiency. 4、Good Material: Forged with high quality alloy steel material also has excellent durability for long term using. 5、Easy to Install: Light in weight and compact in size the simple installation can be quickly finished within minutes.