Carbide carving bits for power carvers and rotary tools. These bits all have a 3/32" (2.35mm) diameter shank for medium speed power tools such as Dremel Tools. Maximum RPM is 5,000-35,000, depending upon head diameter. These carbide bits are used in a variety of household and hobby uses including wood carving and metalworking. The 3/32" shank can be used in most popular power carving tools including wood carving tools and consumer rotary tools. Overall length of each bit is 1.74" (44.5mm) unless noted otherwise.