Weitlaner 3 x 4 Sharp Prong Retractors Sharp Retractor 7 inch Sharp Points Stainless Steel . A self-retaining, small spreader suitable for small sites. Two blades, hinged in the middle, separate as the handles are closed and are held open by a Rachet. The blades turn down at right angles at their tips, and are bowed towards each other so that they push the edges apart and retain themselves in it. High Quality Instruments, 100 % Money Back Guarantee.