BTB-1 Spare Heavy Duty Blades which fit the BTC-1 Olfa Cutting and Scraping Knife.

The spare blades are supplied in packs of 3, and come sealed in a resealable plastic container for safetly.

Each blade is 43mm x 43mm x 0.6mm and has two cutting edges, so is reversible for a fresh edge. Each edge is specially ground on one side only.