Drill Shank Set, 200mm Drill Shank. 50mm carbide hole saw Kit

I found this at the liquidation store. Google showed me the item in Amazon. Amazon describes it as follows (except erroneously called it 250mm)...Drill Shank Set, 200mm Drill Shank plus 50 mm carbide hole saw, No Blade Drop for Hammer drillAmazon sells them for $14 + $27Their details try to explain...Great Hardness: The drill bit shank set has very high hardness, the drill bit shank set has powerful impact resistance and very fast drilling speedApplicable Scenarios: This core bit can be used for the connection of electric hammer and impact drill equipment and the conversion of hole openerHigh Carbon Steel: This drill bit shank set is forged from high carbon steel, quenched at high temperature, with a incisive edge, wear resistantHard to Fall Off the Edge: Our drill bit shank set is not easy to fall offStrong Welding: With high frequency welding technology, this drill bit shank set has a very strong welding port, and the internal and external welding seaGet it all.. Perfect for everyday use. supreme materials and excellent craftsmanship ensure long-lasting durability.