A dispenser for length material comprises a first resiliently biased locking roller and a second locking roller defining a nip therebetween for the passage of length material to be dispensed, the second roller being carried on a frame which upon appropriate movement causes the second roller to move into a locking position in relation to the first locking roller to clamp the length material to prevent unreeling or return of the free end thereto once appropriate cutting of a portion of the length material has been effected.