Up for sale is a new 10-28 Shoulder Thumb Screw. The Thumb Screw is being sold as a machinist made replacement for the Stanley No. 78 Depth Stop Screw. It has a press fit washer to act as the shoulder. It measures about 1" long, made of W1 Water Hardening Tool Steel. This sale is for one Shoulder Thumb Screw. Please look at all the pictures to help with description and condition.