7 PIECES || Set includes 6 different sized cork borers and one ram rod - Borers neatly nestle into each other for easy and convenient storage USEFUL || Can be used for a variety of functions including punching holes on an agar plate in microbiology, taking samples from living trees for tree ring analysis and for cutting holes in both rubber stoppers and corks prior to inserting glass tubing VARIOUS SIZES || Diameters of borers: 4mm, 6mm, 7.5mm, 9.5mm, 10.5mm and 12mm DURABLE & STURDY || Cork borers are made of high quality, sharpened nickel-plated brass tubing with attached plastic handles - Ram rod is made of high quality steel GREAT FOR LAB USE || Designed for use in a laboratory or educational setting, but also great for various functions around the house in crafting and home improvement projects Set includes 6 different sized cork borers and one ram rod. Borers neatly fit into each other for easy and convenient storage. Can be used for a variety of functions including punching holes on an agar plate in microbiology, taking samples from living trees for tree ring analysis and for cutting holes in both rubber stoppers and corks prior to inserting glass tubing. Diameters of borers: 4mm, 6mm, 7.5mm, 9.5mm, 10.5mm and 12mm. Cork borers are made of high quality, sharpened nickel-plated brass tubing with attached plastic handles. Ram rod is made of high quality steel. Designed for use in a laboratory or educational setting, but also great for various functions around the house in crafting and home improvement projects. Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.