5 boulder glass breaking pen for X - 11 Pro Max rear glass repair, Auto-spring glass blaster, glass breaking pen for mobile phone repairing broke glass, strong power, cell phone rear glass cover breaker tools, suitable for disassembly and repair of glass back cover and broken lens module of Android mobile phones. 5 Glass Breaking Pen For X - 11 Pro Max Rear Back Glass Repair Product Features : Portable, durable use. Broken glass instantly. Hardness reach 58-62 Spring tungsten steel hammer tip. Tip of pen use high hardness HSS steel. High hardness, good wear resistance strength. It breaks in one blow, without hurting mobile phone back cover. Product Specification : Item Name: Boulder Glass Breaking Pen Weight: 0.1kg Compatible models: For X-11 Pro Max, HUAWEI P/Mate Series Package includes : 1pcs x Mechanic Boulder 5 Glass Breaking Pen