Engrave it electric engraving pen

Engrave it electric engraving pen

I bought an engrave it electric engraving pen last month and found it to be very easy to use, but the engraving head wears very quickly. if I know, I should buy more engraving head.
I am online shopping, it is not cost-effective to buy the carving head alone, can only wait, when have to buy other products, again bought together.

Engraving head: special steel, with pointed and round heads (optional, all 2 heads)
Product weight : 94~96 grams
Power supply : No. 3 battery * 2
Dimensions : Length 16 cm (without engraving head) * Width 3 cm * Height 2.5 cm
Applicable object: Ball pen / CD record / glass / wood / other materials
Price: 2 USD~ 2.7 USD
Reviews :
The font can't be carved too deeply, and the deeper friends who like to give the word to the sculpture will be very disappointed.
Sound: It is similar to an electric fan. Compared with other styles of carving machines, the sound is very small, and people outside the room can't hear it.
Durability:
The tip of the pointed tip is easy to wear off. If you use a pointed tip, it is recommended to buy more.
There is no such problem with the round head.
Efficiency: Not high, can't quickly engrave the depth you want, the depth of each carving is similar to the use of hand to engrave.
Overall rating: 6 stars / 10 stars
Evaluation (noise): 10 stars / 10 stars
Evaluation (durability): 3 stars / 10 stars
Evaluation (price-performance ratio): 10 stars / 10 stars
Evaluation (efficiency): 5 stars / 10 stars

engrave it 电动雕刻笔
上个月买了一只engrave it 电动雕刻笔, 发现蛮好用的, 但雕刻头磨损的很快,早知道就多买几个了.
我是网购的,单独买雕刻头是不划算的,只能等待,有要买其他的产品,在一起买了.

雕刻头: 特殊钢, 有尖头和圆头两款(任选,计2个)
产品重量 : 94~96 公克
使用电源 : 3 号电池 2 颗
尺寸 : 长16 cm(未含雕刻头) * 宽 3 cm * 高 2.5 cm
适用对象 : 原子笔/CD唱片/玻璃/木头/等材质
售价 : 2 USD~ 2.7 USD
使用心得 :
字体无法雕刻的太深,喜欢把字给雕刻的较深的朋友会很失望.
声音 : 和电风扇差不多,与其他款式的雕磨机相比,声音非常的小,房间外的人是听不到的.
耐用性:
尖头的顶端很容易磨损掉,使用尖头的,建议多买几个.
圆头的无此问题.
效率 :不高, 无法迅速的雕出你要的深度, 每次雕刻的深度和使用手工者,是差不多的.
总评价 :6星/10星
评价(噪音) :10星/10星
评价(耐用性) :3星/10星
评价(性价比) :10星/10星
评价(效率) :5星/10星