Check the listing for details. Disston Keystone Keyhole Compass Saw Blade Model 4 / K4 8-10 TPI 12" / 14". Condition: New. Listed at 10.25 USD. 14" (12") Disston Keystone Compass Saw Blade No. K-4 (Model 4) (K-304) (No. 4) 12" usable length Disston Inc. Made in USA - Danville, VA New Old Stock - Rare Find!!!! (Disston is no longer in business) Note: DISSTON - 8 TPI (some labeled 10TPI) - Model 4, K-304 or K-4 12" blade. All are identical except the labeling. 8 - 10 Teeth per inch Overall Length = 14"Usable Blade Length = 12" Hole Size = 1/4"Slot Size = 1/4" x 1 3/16" Width of blade at slotted end = 1 5/16" Original Unused Blade from a old hardware store. New Old Stock (Disston is no longer in business) This blade will fit other brands of Compass / Keyhole saw handles that have same hole /slot pattern. See photos for drawing with measurementsNote: at time of listing..I have several blades available. You are buying one blade with option to purchase more. I have photos of the different style of labeling on the blades I have. Other than the slight different labeling, they are all DISSTON - 8 TPI (some labeled 10TPI) - Model 4 or K-4 12" blade.Please ask questions before purchasing if any concerns. Inv # 1204-400 90655