Features: Spring Triangular Handle: Unique Triangular handle with spring with comfortable grip, reduces operating hand fatigue, and makes easy and more convenient. Inside spring and hollow heat dissipation : with spring and hollow effectively dissipate heat, prevent overheating phenomenon, prolongs the service life of the tool and improve work efficiency. Brazing hole opening function: Specially designed for brazing hole opening, it can accurately and quickly open holes on the workpiece ensures effect of welding. Precise and accurate: Precise design, easy to operate, accurately improve work efficiency. Multiple function application: In addition to brazing openings, it can also be used for opening in other handmade projects, practical tool Specifications: Item: Solder Hole Opener Component：Alloy Diameter：about 35mm/1.38in 40mm/1.57in 45mm/1.77in 50mm/1.97in 55mm/2.16in 60mm/2.36in Package Includes: 1PC Solder Hole Opener note: Please allow 0-1cm error due to manual measurement. please do not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color