This depth stop for Lancaster-style shrinker/stretcher bodies was developed by Ron Covell to guide a consistent working depth. Featuring durable stainless steel guide arms and adjustable from 1/8 to 1 inch deep, this backstop will make using shrinker/stretcher tools easier than ever before. Works on bench-mounted or stand mounted shrinker stretchers based on the Lancaster design. 3/4 inch slotted mounting holes on 2.5 inch centers.