Abstract: A device (10) for facilitating use of the shaft (28) of a golf club (30) for plumbing is disclosed. The device comprises two concentric members (12, 16), one freely movable inside the other, with the inner member (16) seated about the shaft (28) of the club (30). Plumbing is achieved by gripping the outer member (12) between two or more fingers, whereupon the free movement of the inner member (16) relative to the outer member (12) permits the club (30) to assume a truly vertical orientation with the head (44) of the club (30) serving as a plumb weight. The shaft (28) may then be used to judge the relief of the putting surface in the usual manner, but with the assurance that the club (30) is in a true vertical orientation.