Durable Material Tungsten Carbide Head, High Speed Steel ShankSizes Total length - 40mm(8/5"); Shaft Diameter - 3mm(1/8"); Outer diameter of the tip - 2.7mm, 2.8mm, 2.9mm, 3mm, 4mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.2mm, 5.9mm, 6mm, 7.6mm, 8mm; Tip blade length - 0.8mm, 1.3mm, 1.9mm, 2.3mm, 2.6mm, 3.2mm, 4.4mm, 7mm, 7.3mm, 7.5mm, 8.8mm, 9.3mm, 9.6mm, 10.5mm, 11mm, 12mmMulti-Purpose Uses Ideal for processing all types of materials such as wood, plastic, foam, resin models, etc.Includes 20 Different Tools Burrs, grinding head and milling tools, etc. Meet most of your drilling requirements, perfect for engraving, chamfering, chamfering, grooving, reaming, hollow machining.Compatible Machines Can be machined with most grinders and engraving tools - compatible with Dremel, compatible with Proxxon, compatible with Mister Tool, compatible with Einhell and identical machines. Durable Material Tungsten Carbide Head, High Speed Steel ShankSizes Total length - 40mm(8/5"); Shaft Diameter - 3mm(1/8"); Outer diameter of the tip - 2.7mm, 2.8mm, 2.9mm, 3mm, 4mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.2mm, 5.9mm, 6mm, 7.6mm, 8mm; Tip blade length - 0.8mm, 1.3mm, 1.9mm, 2.3mm, 2.6mm, 3.2mm, 4.4mm, 7mm, 7.3mm, 7.5mm, 8.8mm, 9.3mm, 9.6mm, 10.5mm, 11mm, 12mmMulti-Purpose Uses Ideal for processing all types of materials such as wood, plastic, foam, resin models, etc.Includes 20 Different Tools Burrs, grinding head and milling tools, etc. Meet most of your drilling requirements, perfect for engraving, chamfering, chamfering, grooving, reaming, hollow machining.Compatible Machines Can be machined with most grinders and engraving tools - compatible with Dremel, compatible with Proxxon, compatible with Mister Tool, compatible with Einhell and identical machines.