7/8" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Tekton L-keys are made with

Tekton L-keys are made with 8660 nickel chromium molybdenum steel that's heat-treated to 54–58 HRC to produce tools that are hard

• Sizes are marked both with a high-visibility laser marking and a permanent stamped marking that won't wear off • Deep 6-point socket openings provide an exact fit for hex fasteners • Radiused corners prevent fastener round-off by applying force to a fastener's flat sides

Part Number: 31C50SHCSB

The socket size is marked in two ways on every socket—both as a high-visibility laser marking and a permanent stamped marking

Part Number: 56F550HCSSS

7/8" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Tekton L-keys are made withProduct Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and