For 1 3/4" to 2 3/4" (44.5 - 66.9mm) Cylinders. Precision built for small cylinders. Stones are 3 1/2" long, assuring unusual accuracy. Stones cover full range, are easily changed, and available in four grits. Comes complete with 16410, 16420 and 16430 medium grit stone sets in sturdy storage case. Small Cylinder Hone -16340- Spring -16130- Driver assy -16330- Stone Locking Screw -16540- Jaw Casting Cylinder Size 80 Grit 180 Grit 280 Grit For Alum. Range ------------------------------------------------------------------------------------------------ 1.75"-2.20" 16440 16410 16380 16470 44.5-55.9mm * 16570 ------------------------------------------------------------------------------------------------ 2.05"-2.50" 16450 16420 16390 16480 52-63.5mm *16580 ------------------------------------------------------------------------------------------------ 2.35"-2.75" 16460 16430 16400 ------------ 59.6-69.9mm * 16590 ------------------------------------------------------------------------------------------------ -37110- Retainer screw *This can't run with 4 stones *Yes, it is considered rigid. *Just comes with 180 grit *Stones made of silicone carbide *Larger the grit, finer it is *All the stones will work on cast iron or steel with the exception of 16470, 16480 & 16590 *16420 stones come mounted on it