Abstract: In some embodiments, a device may include a mounting base and a slidable rack. The mounting base may be configured to couple to a structure and may include a guide extending from the mounting base. The slidable rack may be movably coupled to the guide of the mounting base. The slidable rack can include a substantially triangular base and a member including a proximal end coupled to the substantially triangular base and including a distal end. The slidable rack may further include a first arm assembly coupled to the member and extending adjacent to the substantially triangular base. The first arm assembly includes a plurality of notches that open toward the substantially triangular base. The slidable rack further includes a second arm assembly coupled to the distal end of the member. The second arm assembly may include a plurality of notches that open outward.

Abstract: An anchor bolt inserted in a mounting hole includes: a shaft including an expanded diameter portion formed on its distal end, the expanded diameter portion having a tapered outer peripheral surface; a sleeve, into which the shaft is inserted from the proximal end side of the shaft, such that the sleeve covers an outer peripheral surface of the shaft, the sleeve including an expandable portion, which is configured to bend outwardly along the expanded diameter portion when pushed from an insertion complete state of the shaft; and a fitting piece connecting the shaft and the sleeve. A first recessed groove is formed in a peripheral surface of the sleeve. A ring, which contacts an inner peripheral wall of the mounting hole, is fitted in the first recessed groove.