To easily straighten the corners of the product, you can use a special tool - a peg.The peg has a pointed one on one side and a rounded end on the other for convenient use.
The pointed end straighten the seams of collars, valves, etc., or remove the thread remaining from the preliminary work (basting), and the rounded end can hold the allowances during ironing.
The peg is made from environmentally friendly beech.