Features: Made of high-quality steel, it is high hardness, wear-resistant, and durable. Full set of roller punches in different sizes to meet your different needs. Excellent tools for breaking or drilling a wall, concrete, stone or other materials. Inverted tapered end caps prevent slipping, scratching, and damage to your machines. Equipped with a convenient carry bag, keep your tools organized and portable. Recessed Hemispherical Rollers: Hemispherical tips for cradling the spindle, the inverted tapered tips prevent slipping, scratching and damage to your machines. High-Quality: This set of thumbtacks is made of high-quality 40CR metal, forged, heat-treated, and knurled steel for extreme durability. Excellent grip: The knurled handles are deeply cut and allow you to get a good grip while framing the hand.