1. Product information 30MM HEX AVT DEMOLITION HAMMER rah Satisfying the professional s needs HM1317C Blows per minute 730 1450 bpm Input wattage 1510 w Shank size 30 mm Vibration Chiselling 8 5 m sec Vibration K factor 1 5 m sec Noise sound pressure 81 dB A Noise sound power 101 dB A Noise K factor 2 4 dB A Net weight 17 kg Impact energy High 25 0 J Impact energy Low 21 0 J e LED lamp indicates when to replace carbon brush e Double Insulation e Variable speed e Constant speed under load e Soft start e Includes carry case Details correct as of 18 3 2014 Makita reserve the right to change specifications at any time owing to their policy of constant improvement Accessories shown are not necessarily supplied A 4 A www makitauk com