It is comprised of a hardwood inclined plane, 24 in
(600 mm) x 4 in
(100 mm) Fitted with a pulley, 0.88 in
(22 mm) diameter, mounted at the free end It is hinged to a horizontal polished wooden base, 18 in
(450 mm) x 4 in
(100 mm) Base is fitted with an aluminum arc graduated both vertically and angularly The inclined plane can be fixed at any angle up to 45° or at a suitable height with a metal clamping wingnut Includes: 2 wooden blocks with eyelets, 8 in