What it the bow extension referred to in the description

The Bow Extension is also known as the Iso-Core, extension straps, and or Iso-Core Straps.

I know the picture is the new s3 classic but other pictures show the old model. which one is amazon selling

Amazon is selling our new S3 models in the UK. Thanks!

We have the Bullworker but no instruction booklet, Im sure that there should be one

Yes you should have an instruction booklet. Ask for one and download a PDF while you are waiting.

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Description

💥 Sculpt smarter, not harder — your all-in-one portable power gym!

ISOMETRIC POWER BOOST - Build muscle up to 66% faster with science-backed isometric training.
CUSTOMIZABLE RESISTANCE - Five variable springs let you tailor your workout from beginner to beast mode.
JOINT FRIENDLY HIGH IMPACT - Low-impact on joints but high-impact on gains—perfect for sustainable strength.
EFFORTLESS STRENGTH ANYWHERE - No setup, just grab and go for a full-body workout anytime, anywhere.
PREMIUM CRAFTSMANSHIP EXTRAS - Durable aluminum, ergonomic handles, plus workout guides and a sleek carry case.

The Bullworker Bow Classic 90cm is a sleek, portable isometric exercise device designed for full-body strength training. Featuring 5 interchangeable resistance springs offering up to 150 lbs, it delivers customizable workouts that accelerate muscle gains by up to 66% faster than traditional lifting. Crafted from laser-etched aluminum with ergonomic handles, it’s perfect for men and women seeking a joint-friendly, space-saving home gym solution with included workout routines and a convenient carrying case.

Handle type	Fixed Handle
Strap type	Adjustable
Maximum weight recommendation	160 Pounds
Global Trade Identification Number	00896529000009
UPC	896529000009
Color	Sleek Black
Size	90 CM
Hand orientation	Right Hand
Item display length	36 inches
Weight	1.36 kg
Material type	Aluminium
Number of items	1
Included components	5 Interchangeable Variable Resistance Springs, Canvas Carrying Case, Non-Slip Pad, User Manual, Fitness Journal and 90 Day Routine
Batteries included?	No
Department	Unisex
Manufacturer	Bullworker
Item model number	Classic
Product Dimensions	54.99 x 14 x 5.99 cm; 2.5 kg
ASIN	B001I1K6E0

Bullworker Bow Classic 90cm Isometric Exercise Equipment, Portable Strength Training At Home Gym Equipment for Back, Shoulder, Chest, Biceps, Abs, Arm, Ab Workout, All In One Exerciser for Men & Women

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