@@@@@@@@@@@@@@@@@@@@ I am selling mainly tools. For those who purchase 2 or more sets of any size, I will also include a 6.5 drill chuck. I look forward to your comments. @@@@@@@@@@@@@@@@@@@@ Diamond Core Bits 10 mm Total: 6 sets ●Diamond Core Bits 6mm 6 sets ¥900 8mm 6 sets ¥900 10mm 6 sets ¥1000 12mm 6 sets ¥1100 Also available, so I will change it if you comment. For 2 or more sets: A 0.3-6.5mm drill chuck will be given as a gift. First come, first served. ☆Can be attached to electric drills, rechargeable drivers, drill presses, etc. ☆Holes can be drilled in glass, tile, brick, pottery, marble, granite, plastic, wood, veneer, slate, plywood, corrugated sheets, iron plates, metal alloys, bimetal, styrofoam, stainless steel, copper, aluminum, etc. When using, it is recommended to use cooling water. Diamond core drill, hole saw, core bit, core drill, drill bit ※Notes※ ☆Due to being an overseas product, there may be some scratches, dirt, or dents on the product, so please understand. ☆Due to being an overseas product, a lot of oil is attached, so please handle with care. ☆Due to shipping costs, it will be shipped without a box. ☆We have decided the price considering shipping and handling fees, so we cannot negotiate a discount, so please understand. ☆I also sell construction hardware, tools, and DIY supplies little by little. Set sales are also possible, so I will discount the shipping + α, so please take a look if you like.