Bostitch 2.5 in 15 Gauge 20 Volt Max Cordless Finish Nailer Workout Room Flooring A: No additional underlayment is FRUSTRATION FREE Detailed A: No additional underlayment is required as padding is pre attached to each plank Compatible with makita 18 Volt lithium ion batteries with a star symbol (battery sold separately) 5 Weight (lbs Drives 15 gauge FN style angled finish nails from 1 1 4 in to 2 1 2 in length Narrow nose designed for clear line of sight and accuracy of nail placement Tool free depth adjustment for precise countersinking of nails Tool free selector switch for sequential or contact actuation modes Tool free jam release to quickly and easily clear nail jams Multi functional LED lights help to provide both workspace illumination and tool diagnostics Tool free stall release lever to quickly reset the driver blade in the event of a stall Adjustable belt hook for left or right attachment Brushless motor for optimal runtime and durability