1.兩段式加長臂：使用范圍相對較大，但是他的主要功能也即是為了提升挖掘半徑，在清理河道，填海造地，地鐵出入口開挖，人行地底隧道，還有高速公路防護墻修整，一般住宅輸送一下水泥等等。也有人用他前置破碎錘作用于房屋拆遷的，不過比較危險。兩段式加長臂一般10-26米區間改裝比較多。
1. Two-stage lengthening arm: the scope of use is relatively large, but its main function is also to improve the excavation radius, in order to clear the river, fill the sea to make land, excavate the subway entrance and exit, the pedestrian underground tunnel, and the repair of the highway protective wall, and the general residential transport of cement. Some people use his front crushing hammer to act on house demolition, but it is dangerous. Generally, there are many modifications in the 10-26m section of the two-stage extension arm.
2.三段式加長臂：或者多段式加長臂，主要應用于高層建筑的拆遷，前置破碎錘或者液壓鉗。20-28米內使用者比較多。
2. Three-segment lengthening arm: or multi-section lengthening arm, mainly used for demolition of high-rise buildings, with front breaking hammer or hydraulic tongs. There are many users within 20-28 meters.
3.滑臂或者內伸縮臂：主要為了回轉半徑很小，但是挖掘深度要求很高的工況設計，一般會前置貝殼挖斗（貝形斗）?；鄞怪蓖诰蛏疃纫话銥?0米，內伸縮臂垂直挖掘深度一般在26米以內。
3. Sliding arm or inner telescopic arm: It is mainly designed for working conditions with small turning radius but high excavation depth requirements. Generally, the shell bucket (shell bucket) is fronted. The maximum vertical excavation depth of the sliding arm is generally 10 meters, and the vertical excavation depth of the inner telescopic arm is generally within 26 meters.
4.打樁機加長臂：大小臂平直，前置彎臂2.6米左右（主要是為了與振動錘連接是便與閥塊和管路的安裝）及震動錘，應用于修建公路鐵路或者埋設管道的時候打拔鋼板樁。
4. Extending arm of pile driver: the large and small arms are straight, the front bending arm is about 2.6 meters (mainly for connecting with the vibration hammer to facilitate the installation of valve blocks and pipelines) and the vibration hammer, which is used to drive and pull steel sheet piles when building roads and railways or burying pipelines.
5.抓木機、抓料機裝卸煤機加長臂：更多的時候為了裝卸火車或者汽車而設計，一般大臂7.6米，小臂5-6米.前置抓木器、抓鉗器或者貝殼挖斗。
5. Wood grabber, material grabber, coal loader and extension arm: more often designed for loading and unloading trains or cars. Generally, the large arm is 7.6 meters, and the small arm is 5-6 meters. The front wood grabber, gripper or shell bucket.
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