Straight Handpiece - ES6?ÿis a slow speed handpiece used in dentistry. This dental slow speed handpiece is made of a stainless steel body. The slow speed handpiece rpm extends to a maximum of 40,000. The straight slow handpiece by Saeyang Marathon offers good handling convenience. This is an autoclavable handpiece that offers precision and reliability. The gear ratio of the slow handpiece is 52 grams.