So-called because of the flat sides of the peening head. Small diameter head tapers slightly. Delivers a "seating blow" to tap a short, small pin held between thumb and forefinger. Mfg: Brownells SPECS: 8 oz. – Overall length 12" (30.5cm). Head, overall, 4" (10.2cm). Face, 7/8" (22.2mm) dia. 8 1/2 oz. (240g) head. 10 oz. – Overall length, 12 1/2" (31.8cm). Head, overall, 4 1/2" (11.4cm). Face, 1" (25.4mm) dia. 10 1/2 oz. (300g) head.
