# Overkill Dialog Box [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) **Function Description:** Removes duplicate geometry as well as overlapping lines, arcs and polylines. Also combines partially overlapping or contiguous ones.  **Dialog Box Options:** ## Object Comparison Setting - **Comparison Precision:** Controls the precision with which OVERKILL makes numeric comparisons. If this value is 0, the two objects being compared must match before OVERKILL modifies or deletes one of them. - **Ignore object property:** Selects these object properties to ignore them during comparison, including Layers, Linetype, Color, Lineweight and Plotstyle. ## Object type (Lines Arcs and Plines) and overkill style - **Plines - Optimize segments within plines:** When selected, individual line and arc segments within selected polylines are examined. - **Overlap - Combine co-linear objects that partially overlap:** Overlapping objects are combined into single  objects. - **End to End - Combine co-linear objects when aligned end to end:** Objects that have common endpoints are combined into single objects. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences/OVERKILL_DIA.html) · © Gstarsoft Co., Ltd.