Final answer:
A friction grip shank fits into a contra and go attachment for a low speed handpiece. 3) Friction grip shank
Step-by-step explanation:
The type of shank that fits into a contra and go attachment for a low speed handpiece is a friction grip shank.
A friction grip shank is commonly used for low-speed handpieces in dentistry. It is designed to provide a secure and tight fit between the shank and the attachment, ensuring stability during dental procedures.
Other types of shanks, such as straight shank, latch-type shank, and tapered shank, may be used in different dental instruments and attachments, but for a low speed handpiece with a contra and go attachment, a friction grip shank is typically used.