Abstract: A tubular device which is anchorable to a plate member comprises a first part including a tubular sleeve having resilient legs formed on one end thereof and an annular flange separating the legs from the rest of the sleeve and a second part comprising a tubular actuating member received in the sleeve. The tubular actuating member has a tapered end adjacent the legs. The tubular device is adapted to be received in a bore through a plate member whereupon the actuating member may be urged into engagement with the legs whereby the actuating member spreads the legs, causing the plate member to be gripped between the legs and the annular flange. The actuating member may be left in engagement with the legs, thereby to hold the legs in the spread configuration.