Floating pilot reamers use interchangeable pilots that are positioned at the front of the reamer. A morse taper reamer is used manually to finish morse taper sleeves. A reamer is a type of rotary cutting tool used in metalworking. The planned difference between the drill diameter and the reamer diameter is called an "allowance". The hole is then prepared to a precise diameter with a reamer. A straight reamer is used to make only a minor enlargement to a hole. A combination reamer has two or more cutting surfaces. This ensures a long life for the reamer and a superior finish to the hole. An adjustable hand reamer can cover a small range of sizes. The blanks are forced on the reamer by hand to a stop. A machine reamer only has a very slight lead in. BOSS TU-2, DigiTech Whammy, Crowther HotCake, Kaisser Instruments Reamer and Pro Co RAT. Before reaching this point, it needs to be scraped down with a reamer. It also allows the reamer to start straight and reduce the risk of breakage. The reamer shown is a finishing reamer.