Name: Rear Exhaust Air Screwdriver Model: AT-305 Mechanism: Slip Clutch Capacity: M2-6mm Air Pressure: 90psi Air Consumption: 0.28cfm Free Speed: 2000rpm Length: 238mm Noise: <80dB Weight: 0.6g QTY. Per Carton: 20PCS Net Weight: 14kg Gross weight: 16 kg Carton MEAS: 25.5× 25.5× 27cm Name: Auto Shut-off Air Screwdriver Model: AT-306 Mechanism: Slip Clutch Capacity: M2-6mm Air Pressure: 90psi Air Consumption: 0.2cfm Length: 230mm Free Speed: 1000rpm Weight: 0.67kg QTY. Per Carton: 20PCS Net weight: 14.5 kg Gross weight: 16 kg Carton MEAS: 51× 31× 26cm Name: Air Screwdriver Model: AT-3.5MA Mechanism: Slip Clutch Capacity: M4mm Air Pressure: 90psi Length: 210mm Air Consumption: 0.24cfm Free Speed: 1700rpm Noise: <80dB Weight: 0.6g QTY. Per Carton: 20PCS Net Weight: 14kg Gross weight: 16 kg Carton MEAS: 25.5× 25.5× 27cm.