10pcs SANDNET NSK Style Dental High Speed Turbine Handpiece Push Button 4 Hole. 2 Hole is also available!! If you want, pls leave me message, thanks! Every feature of STNABM handpieces is precision engineered to deliver enhanced performance with the reliability and durability SANDENT users expect. Speed: 380,000480,000 min-1. Head Size: ø10.3 x H13.5 mm.