Check the listing for details. NEW LAPIDARY GLASS 1/8" 1/4" DIAMOND CORE DRILL BIT SET. Condition: New. Listed at 13.50 USD. SET OF 2 BITS WITH FREE SHIPPING!!! This auction is for a NEW 1/8", 1/4" Diamond core drill bit set. NEW HIGH QUALITY DOUBLE DIAMOND PLATED! You've got to try these NEW core drill bits!. The bits have twice as much diamond abrasive as normal bits. Their double plating process insures longer and smoother drilling life. Excellent for drilling circular holes in glass or stone. Diamond coated core drills with side opening to improve effectiveness of coolant flow thru. Stainless steel drills with medium coarse diamond and nickel plating for bonding. We recommend the use of cutting Oil or water as coolant for longer life. FREE shipping FIRST CLASS MAIL INCLUDES Delivery Confirmation and INSURANCE!!! I will gladly combine shipping on multiple auctions that ship together, please email for shipping totals on combine auctions. I prefer PAYPAL FREE SHIPPING!!! (FREE SHIPPING 50 STATES ONLY.) COMBINED SHIPPING AVAILABLE!