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Hammer Black Widow Nasty

Photo and specs courtesy of bowling.com. Reproduced with credit to the maker.

How it moves

Foul lineArrows · 15 ft47 ft · board 5.57.5° entry
Hockey-stick turn (asymmetric core). Dotted is skid, then the turn, then the roll into the pocket. Estimated from the coverstock, finish, core, and differential for a right-handed bowler with medium revs on a house shot. Lane conditions, speed, and layout move all of this.
Hammer

Black Widow Nasty

Discontinued
Hook potential7 (est.)7 of 10, estimated

How much the ball wants to hook, 1 (straight, a spare ball) to 10 (the strongest oil-eaters). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.

Coverstock
Violent Wheel
Reactive solid
Core
Widow
Asymmetric
Factory finish
4000 Abralon
Color
Black / Purple / Red Sparkle
Released
2009-12-15
USBC
Approved 2009-11-01

Weights and specs

WeightRGDifferentialInt. diff
12 lb2.600.039—
13 lb2.530.055—
14 lb2.580.0530.006
15 lb2.560.0560.006
16 lb2.580.0500.006

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
4000 Abralon. Skims the oil and saves its energy for the dry part of the lane: longer skid, later and sharper hook. Polished and pearl balls. Surface changes over games, and a pro shop can take any ball either way with a pad.

Balls like this

Same coverstock and core type; the closest company for this ball in a bag.