| 摘要 |
A holder or assister for enabling one person to set and stretch a chalking line and strike a chalk line without an assistant. The holder comprises a toe plate, a tubular member and a retainer plate integrally formed with each other and a center shaft inside the tubular member, these parts cooperate to hold the assister on various configurations of workpieces. Means are provided to attach one end of a chalking string to the assister and to permit accurate alignment of the chalking string with a reference mark on which a chalk line is to be struck.
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