Makita DFR551Z 18v LXT Cordless Auto Feed Screwdriver Body Only Makita DFR551 is a cordless auto-feed screwdriver powered by a 18v LXT Li-Ion battery (sold separately). For 25-55 mm screws.  Suitable for repetitive screwdriving tasks such as drywall and decking application using strip fed screws 25-55mm. FEATURES Brushless motor Ergonomically designed handle with soft grip Push drive technology One-touch casing attachment/removal reduces the trouble of reversing and replacing a bit Screw feeding mechanism redesigned to improve durability and reduce screw fall Lock-on function Trigger Lock Reversing switch Variable speed control Anti-restart function SPECIFICATION Voltage: 18 v Drive Shank Hex: 1/4\" Screw Size Range: 25 to 55 mm NOISE & VIBRATION Noise Sound Pressure: 74 dB(A) Noise K Factor: 3 dB(A) No Load Speed: 0 - 6,000 rpm Vibration K Factor: 1.5 m/sec² Vibration: 2.5 m/sec²