Aluminum rim. Screw driver & wrench style hands. Conspicuous arabic numerals. 1.75 in. W x 16 in. L x 16 in. H This wall clock features a yellow painted aluminum bicycle wheel. There is a wrench hour hand and a screwdriver minute hand, along with a center gear that ticks every second. Attached to the spokes are numbers every quarter hour. The clock is 16 inches in diameter and 1.75 inches deep. Precision time is kept with a quartz crystal. The clock requires 1 AA battery (not included) and a 1 year limited warranty is included.