Oregon 55-069 2 Line Manual Feed Multi-Bolt Trimmer Head Low Profile This Heavy Duty Head For Nearly All Trimmers Manual Line Feed For Use With Small Medium And Large Size Trimmers Includes Bolts For 7mm x 1.0 LHM 8mm x 1.25 LHF & LHM 10mm x 1.25 LHF & LHM 10mm x 1.0 LHF 3/8-Inch -24 RHF & RHM