HPC - AG-1 - Standard Size Tubular Lock Drill Bit for Tubular Locks (9.53mm)

HPC AG-1 — Standard Tubular Lock Saw / Drill Bit (0.375" / 9.53 mm)

Item description
The HPC AG-1 tubular lock saw is a purpose-built hole saw for servicing standard-size tubular (round) locks with a 0.375" (9.53 mm) diameter keyway. When picking is not possible, this tool allows locksmiths and technicians to service tubular-key lockouts by drilling the pins to the shear line and using a blank key to turn the cylinder.

Key features

• Designed for standard tubular locks (0.375" / 9.53 mm diameter keyway)

• Fits any 1/4" (6.35 mm) electric drill chuck

• Drill-to-shear-line operation — destroys pins at shear line to gain entry when picking is not possible

• Includes 1 extra saw top for quick replacement in the field

• Saw life: approximately 3 openings (depends on lock construction and operator technique)

Specifications

• Model: HPC AG-1

• Keyway diameter: 0.375" (9.53 mm)

• Shank compatibility: 1/4" drill chuck

• Typical life: ~3 uses (varies)

• Not for use on locks with hardened pins or ball bearings in the keyway

What’s included

• 1 × HPC AG-1 tubular lock saw (assembled)

• 1 × spare saw top (extra cutter)

How to use (brief)

1. Verify lock is a standard 0.375" tubular keyway and does not have hardened pins or ball bearings.

2. Install the saw in a 1/4" drill and center it over the lock face.

3. Drill straight into the keyway until the pins are removed to the shear line.

4. Remove the saw, insert a tubular blank key and rotate to operate the cylinder.

Warnings & notes

• This is a destructive method — the lock will be damaged and likely requires replacement afterward.

• Do not use on locks with hardened pins or ball-bearing anti-drill features — the saw will not cut these and may be ruined.

• Use proper PPE (eye protection, gloves) and steady drill control to avoid damage to surrounding hardware.

• Saw life varies; heavy or hardened materials may shorten life.