Function: 1 Selected high-quality aluminum alloy and iron material, durable, wear-resistant 2. High positioning accuracy, low drilling accuracy, easy to operate. 3 The shavings are automatically extracted from the holes on the top of the drill instead of stacked drills. 4 Mainly used for drilling door and window hinges, the structure is simple. 5 Hinge hole puncher with various specification drill bits for woodworking Specifications: